HOW TO KNOW YOU ARE RUNNING A 32-BIT OR 64-BIT UBUNTU?

f you have forgot what bit version of Ubuntu you are running.

There is a nice and simple command line program called uname that tells the current bit version


Open Terminal.

Type 

uname -m 

in terminal and hit enter.

• If the response is i686, you have a 32-bit version of Linux.
• If the response is x86_64, you have a 64-bit version of Linux.

If you want to know more details like Kernel version, Time stamp etc..

Try  

uname -a

i found this add on

http://dailytechnoapps.blogspot.in/2012/04/how-to-know-you-are-running-32-bit-or.html

FIREFOX HACK FOR SUPER SPEED BROWSING!

There are many people out there complaining about the Firefox RAM Memory Bug. Lets get it straight. It’s not a bug. It’s part of the cache feature. This ‘feature’ is how the pages are cached in a tabbed environment.

To improve performance when navigating (studies show that 39% of all page navigations are renavigations to pages visited less than 10 pages ago, usually using the back button), Firefox implements a Back-Forward cache that retains the rendered document for the last five session history entries for each tab.

This is a lot of data. If you have a lot of tabs, Firefox’s RAM memory usage can climb dramatically. It’s a trade-off. What you get out of it is faster performance as you navigate the web.

Now a lot of us have found the ’secrets’ on how to manipulate settings in “about:config” to drop the memory usage as long as possible and to increase the speed at which Firefox loads sites. Read on to find out how to do this.

Remember: Firefox (download it here) is the best internet browser available (in my opinion), and these tweaks below will make it even greater and faster. So enjoy!

Reduce the amount of RAM Firefox uses for it’s cache feature

Here’s how to do it:
1. Type “about:config” (no quotes) in the adress bar in the browser.
2. Find “browser.sessionhistory.max_total_viewer”
3. Set it’s value to “0“;(Zero)

Increase the Speed in Which Firefox loads pages

1. Type “about:config” into the address bar and hit Enter.
(Normally the browser will make one request to a web page at a time. When you enable pipeliningit will make several at once, which really speeds up page loading.)

2. Alter the entries as follows:
Set “network.http.pipelining” to “true”
Set “network.http.proxy.pipelining” to “true”
Set “network.http.pipelining.maxrequests” to some number like 10.

This means it will make 10 requests at once.

3. Lastly, right-click anywhere and select New-> Integer. Name it “nglayout.initialpaint.delay” and set its value to “0“;.(Zero)

This value is the amount of time the browser waits before it acts on information it receives. If you’re using a broadband connection you’ll load pages faster now.
Optionally (for even faster web browsing) here are some more options for your about:config (you might have to create some of these entries by Right Click –> New– > Interger or String

network.dns.disableIPv6: set “false” 
“content.notify.backoffcount”: set “5“; (Five)
“plugin.expose_full_path”: set “true”.
“ui.submenuDelay”: set “0; (zero)

Reduce RAM usage to 10mb when Firefox is minimized:

This little hack will drop Firefox’s RAM usage down to 10 Mb when minimized:

1. Open Firefox and go to the Address Bar. Type in about:config and then press Enter.
2. Right Click in the page and select New -> Boolean.
3. In the box that pops up enter “config.trim_on_minimize”. Press Enter.
4. Now select True and then press Enter.
5. Restart Firefox.

These simple tweaks will make your web browsing with Mozilla Firefox 2-3 times faster and easier. And I think they are fairly easy to apply. Enjoy!

credits: Beepthegeek

i found this add on 

http://dailytechnoapps.blogspot.in/2010/05/firefox-hack-for-super-speed-browsing.html

Stay safe while you surf

Juniper Mobile Threat Centre Report for 2013 shows how in spite of increased awareness and preemptive measures there’s no end to proliferation of datastealing viruses.

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BlackBerry CEO Thorsten Heins announced a few months ago that their popular messenger app BBM would soon be available for Androidand iOS users. Soon after, Android users noticed an app 'Blackberry messenger BBM' on their Play store. According to a CNET report, hundreds of thousands of gullible people went on to download and install it on their devices little aware that it was a fake one.

Whether people were merely fooled or ended up losing sensitive information is not known. But it illustrated how vulnerable the security ecosystem is.

Juniper Mobile Threat Centre Report for 2013 shows how in spite of increased awareness and preemptive measures there's no end to proliferation of datastealing viruses. There was a 155% increase in mobile malware in 2011, while from March 2012 to March 2013 there was a 614% increase. "As many as 73% of all malware exploit holes in the mobile payment by fraudulent premium SMS messages, each generating around $10 in immediate profit," says the report. There are more than 500 third-party app stores containing malicious apps. Android-based malware went up from 47% to 92% last year.

IBM's X-Force report speaks of increase in Advance Persistent Threat to enterprises. The exploitation of web application vulnerabilities rose 14% in 2012 to more than 3,500 known issues or 43% of all reported vulnerabilities led by types of web attacks like 'crosssite scripting' and 'SQL injection' , says the report. "The level of XSS (cross-site scripting) vulnerabilities was the highest X-Force has ever seen, at 53%, driven by third-party add-ons or plug-ins for content management systems. There was also operational sophistication in the way spam botnetsimproved their resiliency against takedowns. Both SQL Injection and Distributed Denial of Service increased year-toyear from 2011."

IBM recently launched a set of network solutions that simplify security management interface. "The next-Gen intrusion prevention appliance helps clients address advanced attacks targeting organizations, by providing visibility into exactly what applications are being used on the network. It enables organizations to monitor and control the activity thereby improving security and reducing cost," said Roman Tuma, director, growth markets, IBM Security System.

Another report, by Kaspersky Lab, said that it detected 19,938,954 internet-borne malware incidents on computers in India during April-June this year. The report says that the attacks via web browsers are the primary method for spreading malicious programs. The virus comes in by exploiting vulnerabilities in browsers, or by misleading a user into believing that a program is genuine. Overall, 35.6% of users were attacked by web-borne threats during this period. This places India in the 15th place worldwide when it comes to the dangers associated with surfing the web.

i found this blog on

http://timesofindia.indiatimes.com/tech/personal-tech/computing/Stay-safe-while-you-surf/articleshow/21272957.cms

How to Recover a Lost Password in WordPress

It’s okay to be forgetful sometimes, especially when you forget your WordPress password. Thankfully, WordPress allows you to recover your password. This article will go over 2 different methods on how to recover a lost password in WordPress.

In fact, I briefly went over these two ways to retrieve your WordPress password, but I felt I needed to do a better job by making sure each step is clear, as well as providing video screencasts for both methods.

How to Recover a Lost Password in WordPress

The simple and easy Way to Recover a Lost Password in WordPress

You probably have already tried your password, or maybe the one you thought was the correct password, and the result was that the password was wrong.

Under the log in is a link to recover your password. When you click it, it will lead you to a simple form asking for either your email or your username.

Once you have clicked the submit button, your WordPress installation will automatically send you an email that will have a confirmation link. You will need to click on that link and you will be directed to a page to reset your password.

(You can right click on the image and open in a new tab or window in order to view the image.)

In some cases, your WordPress installation may fail to send you a password. This may be because of your web host, so you may have to try another way to reset your password.

Here is a video to help guide you through this process.

The more technical way to Recover a Lost Password in WordPress

This method is not specifically a method to recover, but it does allow you to reset your password. It just takes a few extra steps, and a little knowledge with MySQL. This tutorial in particular will be using the MySQL from cPanel.

1. Log into cPanel

2. Scroll to the icon for phpMyAdmin and click. It will open up the database tables that you have running on your hosting account. An example of what to look for in cPanel for phpMyAdmin is to the right.

3. Click on the database table that coordinates with your WordPress install. In fact, if you don’t know what database to look for, open the wp-config.php to find out.

4. Look for wp_users and click to open the rows to that table.

5. Look for your username and click the icon to edit.

6. Find line for password. (You can right click on the image below to view it as a larger image.)

7. As you can see in the image above, there is a place to put a password. When you first see, it, it will look like a bunch of characters are in that field. Remove those characters and put the password you want. The varied characters are there because WordPress only recognizes passwords in the form of MD5 encryption. You will want to put your own password in the text field and then select MD5 in the drop down box.

Once you have done this, click the button that says GO and your password has been reset.

In fact, I’ve created a video for how to recover a lost password in WordPress using cPanel.

i found this add on

http://blondish.net/how-to-recover-a-lost-password-in-wordpress/

NASA GROVER solar-powered robot covers harsh Greenland terrain

© NASA Goddard/Matt Radcliff

A new NASA robot called GROVER that carries ground-penetrating radar for measuring and analyzing layers of snow and ice has survived its first test in the Arctic, proving that it can operate autonomously as a rolling scientific discovery bot in the harsh polar environment.

GROVER, which stands for both Greenland Rover and Goddard Remotely Operated Vehicle for Exploration and Research, was designed by teams of engineering students attending camps at Goddard Space Flight Center in the summers of 2010 and 2011. After that, the rover was later transferred to Boise State University for further development.

"When we saw it moving and traveling to the locations our professor had keyed in from Boise, we knew all of our hard work had paid off,” said Gabriel Trisca, a graduate student from Boise State University who has been involved in the GROVER project from its start. “GROVER has grown to be a fully-autonomous, GPS-guided and satellite-linked platform for scientific research.”

GROVER weighs 8000 pounds and consists of two solar panels that power a suite of equipment, including the radar, that sit atop two large snow mobile tracks. In the Greenland tests, the robot collected data over 18 miles of snow and ice and transmitted data in real time on how its equipment was performing. The researchers initially expected GROVER to go around the clock and cover more ground, but the extreme conditions were hard on the electronics and solar-powered batteries were only able to go for 12 hours before needing to recharge.

Despite the challenges, GROVER was able to detect and analyze a layer of ice sheet that formed after a major melt event in the summer of 2012, which was one of the major goals of the test.

The researchers now have a lot of plans to improve the robot.

NASA says, "Though currently the radar information is stored onboard and retrieved afterward, the GROVER team wants to switch to a geostationary satellite connection that will let the robot transmit large volumes of data in real time. Other possible changes include replacing components that are hard to manipulate in the cold (like switches and wires), merging the two onboard computers to reduce energy consumption, and using wind generators to create more power or adding a sled carrying additional solar panels."

Other ideas include having several smaller rovers that move radially outwards from where GROVER goes, increasing the amount of ground covered. The smaller robots could then come back to the larger one to recharge and transmit data.

You can watch a video about GROVER below.

i found this add on

http://www.treehugger.com/clean-technology/nasa-grover-robot.html

Obama Urges Republican-Led House To Pass Immigration Overhaul

President Barack Obama stepped into the fray in the U.S. Congress over immigration on Saturday , urging Americans to press the Republican-led House of Representatives to approve a plan that is at risk of stalling. Obama used his weekly address to make his case for an immigration overhaul that was approved by the Democratic-controlled Senate and would create a pathway to citizenship for as many as 11 million people living illegally in the United States.
i found this add on
https://www.arcamax.com/currentnews/currentnewsvideos/s-1357046

Amazing Technology

Magic Recorder Pen
The Korean designers team came up “amazing gadget”  ”Recorder Pen“. This is both a pen and a computer.
A magic Recorder Pen is practically no different from an ordinary pen, with the only condition that she can remember writing and send it via Bluetooth to a PC or phone is already in an electronic printed text. Later you can edit, print or send via email.

1956 VS 2011..
Now can you image 2012 vs 2052 ?

i found this add on 

http://massymoron.com/?page_id=76

HD Glasses Recorder Spy Camcorder Camera

Highlights

• This real HD 1280 x 720 OL Sexy glasses with a 5.0 Mega pixel high definition mini digital video recorder built in. The camera is located in the center between the two lenses, and 4G memory cards inside, with a start/stop button to the side. Just press "record", and you’ll be living your own film fantasy! Or use it to record a day in the park, or a meeting with a friend, or a lesson in class.
• 
  

Specification

• Real HD 720P OL Sexy Glasses Digital Video Recorder with 4G Memory
• Included, Spy Camcorder, Hidden Camera
• Video recording function
• Removable flash disk function
• PC Camera function
• Camera: 5.0 Mega pixels CMOS Color Sensor
• Field of View: 60 Degrees
• Built-in microphone range: 2 meters
• 4G memory card included
• Typical Battery Life: 2 hours per 3hour charge
• Record video and audio
• Format: Records in AVI format
• Resolution: 1280 x 720
• Frame rate: 30 FPS
• Working status LED indicator
• User Manual English
• USB cable for charging and data transfer
• Built-in 280mAh rechargeable battery (Charges via USB)
• Control buttons: Power on/off, reset
• Dimension: 160 x 140 x 40mm Easy 1button Control
• Working status indicated by LEDs
• User manual included
• Comes with carrying case
• USB cable included
• Operating temperature: 0~60 degrees Celsius
• Storage temperature: 20 to 80 degrees Celsius
• Operating systems supported: Windows 2000/XP/Vista, Mac, and Linux
• Net weight: 35g
• Comes in retail packaging
• Size: 172*60*58mm

Warning: Do not use this product for any illegal purpose, otherwise you may be subject to prosecutions under applicable laws. You should be aware that we are obliged to provide the information in connection with your purchase of this product to relevant administrative and judicial authorities at their request.

i found this add on

http://www.spycamhidden.com/hd-glasses-recorder-spy-camcorder-camera-p-15.html

Android Gaming Consoles!!!

Google is working on Android based gaming consoles that can take on with Microsoft’s Xbox, Sony Playstaion and others. The Wall Street Journal reported the news about games consoles based on a information from the close sources who is associated with the project which got reported by The Wall Street Journal. 

originally i found this add on 
http://www.siliconindia.com/news/technology/8-Amazing-Products-Google-Is-Currently-Working-On--nid-150048-cid-2.html

8 Amazing Products Google Is Currently Working On!!!!

Bangalore: Google is cooking up more than what we ever imagined. Google Glass is out and so is the driverless cars, but then it is not all; Google is also working on some other awesome products. The latest being the Google balloons that fly high in the sky and provide rural areas with wireless Internet, and then, development of new drugs that can help doctors to better diagnose patients, but these are just tip of the iceberg. Read on to know 8 awesome products that Google is currently working on, as compiled by Business Insider.

#8 Android@Home wants to fully automate your home

The internet of things is really getting popular lately. Here all of your things like Smartphones, tablets, PCs, automobiles, washing machine, doors and many others get connected via internet. Android@Home is Google’s step towards internet of things and towards turning something sci-fi into reality.

originally i found this add on

http://www.siliconindia.com/news/technology/8-Amazing-Products-Google-Is-Currently-Working-On--nid-150047-cid-2.html?utm_source=clicktrack&utm_medium=banner&utm_campaign=DontMiss

No More Running Out of Battery, Introducing the iPhone 5 Battery Case

By using another battery, it can recharge the iPhone up to THREE times a day

Remember the times when we had an antique Nokia phone which we play snake, messaged relatives, called friends, and the battery would last a week? I do, and this past has become a utopia when compared to phones today.  Now a days you can’t play with your smartphone for more than 3 hours and expect it to work after 4pm. Another fact is, the faster the phone is, the more battery it drains, it’s logic.  For that, we have come with solutions: the iBattz iPhone 5 Battery Case.

This accessory charges and protects your precious iPhone 5 from damage, and is advertised to support enough power for 3 days.  How it does such a miracle? Well, it packs two 2200mAh batteries, both the Mojo Refuel and a rugged Moro Armor. The Refuel itself is expected to be available February 2013 for $89.90 while the Moro Armor comes out in March 2013 for $99.90.

Yet, iBattz is coming out with another case model which seems really cool too, the AquaSeal Hi5, which is waterproof and comes with a detachable 2500mAh battery.  Even though you guys may be as excited as I am, there is still no pricing or date of release to this waterproof case.  More information about iBattz and their line of products can be found here. Stay tuned for more!

originally i found this add on

http://tech-crazy.com/

StatCounter: Google Chrome is dominating the browser industry

Google Chrome raced onto the scene just five years ago; a time period when Internet Explorer had entrenched itself as the undisputed leader. The browser became so popular that mid last year it was already disputing the lead with Microsoft's counterpart. Now, according to recent reports from web statistics firm StatCounter, Google has firmly taken the top spot in the browser market, and not by a small margin either.

According to June's data, Chrome holds a global market share of 43%, while IE lags behind at 25%. Meanwhile, Firefox services approximately 20% of the online population, with Safari and Opera coming in fourth and fifth.

It’s interesting to note that Chrome’s dominance may be even greater than the stats indicate, seeing as much of Microsoft’s market share is tied to business use. Offices often have Internet Explorer set as the default browser and employees inherently use the system out of convenience. As a result, StatCounter’s statistics show that Microsoft’s market share undergoes a sizeable loss on weekends. If employers eventually make the transition to rivals Firefox and Chrome, then Internet Explorer’s days could be numbered.

Some might be curious as to how Google rose to the top so quickly. After all, Microsoft effectively held a monopoly over the industry, and Firefox was a hit for those wanting a speedier interface and greater customization. Neowin suggests that much of Chrome’s success can be attributed to its presence on the Android line of mobile devices. Unfortunately for Apple, the iPhone has failed to bring Safari the same loyal following, or at least not in any meaningful way considering Safari is confined to OS X's smaller market share on desktops.

However compelling the StatCounter results may be, these figures do not tell the whole story. StatCounter tracks using page views, while most would agree that the number of users is of greater importance

originally i found this add on

http://www.techspot.com/news/53166-statcounter-google-chrome-is-dominating-the-browser-industry.html

Big Buck Bunny [HD] | FULL MOVIE Short film (2008)

petit montage sur le film big bugs bunny, qui montre le film et le making-off.

300: Rise of an Empire Trailer 2013 - Official 2014 movie trailer in HD - starring Sullivan Stapleton, Eva Green, Lena Headey, Hans Matheson, Rodrigo Santoro - directed by Noam Murro - the Greek general Themistocles battles an invading army of Persians under the mortal-turned-god, Xerxes.

"300: Rise of an Empire" movie hits theaters March 7, 2014.

Based on Frank Miller's latest graphic novel "Xerxes" and told in the breathtaking visual style of the blockbuster "300," this new chapter of the epic saga takes the action to a fresh battlefield—on the sea—as Greek general Themistokles (Sullivan Stapleton) attempts to unite all of Greece by leading the charge that will change the course of the war. "300: Rise of an Empire" pits Themistokles against the massive invading Persian forces led by mortal-turned-god Xerxes (Rodrigo Santoro), and Artemesia (Eva Green), vengeful commander of the Persian navy. 300: Rise of an Empire trailer 2013 is presented in full HD 1080p high resolution.

300: RISE OF AN EMPIRE 2014 Movie
Genre: Action, Adventure
Director: Noam Murro
Starring: Sullivan Stapleton, Eva Green, Lena Headey, Hans Matheson, David Wenham, Rodrigo Santoro, Igal Naor, Callan Mulvey, Jack O'Connell, Andrew Tiernan
Writer: Zack Snyder

300: Rise of an Empire official movie trailer courtesy Warner Bros.

Streaming Trailer is your daily dose of new movies. Our passionate team of producers brings to you the best of officially licensed movie trailers, clips and featurettes.

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Originally i found this video on

http://www.youtube.com/watch?v=leXo4-QLNVc

Dhoni says he backed his instincts to hit winning runs

Dhoni used a heavier bat in the closing stages of the Tri-Nation Series final against Sri Lanka.

By Indo Asian News Service | IANS India Private Limited – 15 hours ago

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Port of Spain (Trinidad), July 12: A beaming India's skipper Mahendra Singh Dhoni said after leading his team to an amazing victory in the tri-series final against Sri Lanka that he backed his instincts to get 15 runs in the last over to clinch the match.

Dhoni in his post-match remarks Thursday said he knew any bowler who was going to bowl the last over would not be as experienced as Lasith Malinga and he backed himself to get the required runs.

"I knew I could look forward to getting the 15 runs in the last over as Shaminda Eranga was an inexperienced bowler and my instinct worked today (Thursday)," Dhoni said.

Magnificent Dhoni snatches trophy from Sri Lanka
Images from the Tri-Nation Series Final: India vs Sri Lanka

Dhoni said he had to change his bat twice in the closing stages of the match as he needed a heavier bat.

Dhoni, who pushed his deputy Virat Kohli ahead to receive the $60,000 winners' cheque and the Celkon trophy along with him as Kohli had led the side to the final, said he was blessed with a smart cricketing sense in assessing the situation.

A distraught Sri Lankan skipper Angelo Mathews felt that Dhoni was a great finisher and eventually he made the difference.

Mathews said his team had its opportunities to consolidate the position, first while batting and then in the field, but their effort fell short in the end.

"When Kumar Sangakkara and Lahiru Thirimanne were out there at 171 for two, we looked at a score of 230-240, but we lost quick wickets because of poor choice of shots," he said, adding that "his bowlers bowled brilliantly".

On the positive side, Mathews said the team showed a lot of character in entering the final and also the way they fought till the end.

Indian seamer Bhuvaneshwar Kumar was adjudged the Performer of the Series and was presented the Polaris car for finishing with 10 wickets in four matches, sharing the top bowling spot with Sri Lankan spinner Rengana Herath, who received the Housla Buland Academy award for the best bowler.

Rohit Sharma for the second match running was presented the Most Trusted Player award for his well compiled 58 while Dhoni was given the Man-of-the-Match award for his heroic match-winning 45 not out.

Upul Tharanga and Mahela Jayawardene received the Perfect Partnership award for scoring centuries opening the innings against India in their first round-robin game.

Tharanga was the highest scorer in the series with 223 runs followed by Rohit with 217.

Mathews was given the Most Flexible Player award for his all-round performance in the series and West Indian Darren Bravo got the Safe Hands award for fielding.

Originally i found this add on

http://cricket.yahoo.com/news/dhoni-says-backed-instincts-hit-winning-runs-235319886.html

Biggest digital camera that can scan two billion galaxies.

To be launched in 2020, Euclid's 1.2 metre diameter telescope is the most ambitious mission to date to map the geometry of the universe.

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LONDON: A new telescope being built by theEuropean Space Agency (ESA) will map the shape, brightness and 3D distribution of two billion galaxies covering more than a third of the whole sky and looking back over three-quarters of the history of the universe. To be launched in 2020, Euclid's 1.2 metre diameter telescope is the most ambitious mission to date to map the geometry of the universe. 

Scientists hope it will help solve key problems in the understanding of the evolution and fate of our expanding cosmos: the roles played by dark matter and dark energy. Dark matter is invisible, but has gravity and acts to slow the expansion. Dark energy, however, seems to be accelerating the expansion seen around us today. 

Together, these two components are thought to comprise more than 95% of the mass and energy of the universe, with normal matter and energy making up the remaining small fraction. But what they are remains a profound mystery. 

To map the distribution and evolution of dark energy and dark matter in the universe, Euclid requires crisp deep images with sharpness similar to that obtained with the Hubble Space Telescope but over a huge area, some 40% of the sky. It will make high-precision measurements of billions of distant galaxies, using a technique called 'gravitational lensing'. 

The mission will effectively look back in time about 10 billion years, covering the period over which dark energy seems to have accelerated the universe's expansion. 

The eight UK institutions working on the mission have been granted a planned A£8.5 million by the UK Space Agency to develop some of the instruments vital for its mapping task and to support the initial development of the necessary data processing capabilities. 

University College London's Mullard Space Science Laboratory is leading the development of the visible imaging instrument and the Open University is receiving a grant to carry out the radiation testing and verification. 

"The UK is leading the design and construction of the main camera for Euclid," said Professor Mark Cropper at Mullard Space Laboratory. "The camera will have 600 megapixels and will be built in the UK with custom-made UK detectors from e2v in Chelmsford. It will also be one of the largest digital cameras ever launched into space and will provide a fabulous view of much of the sky in incredible detail for everyone." 

Euclid's infra-red camera will be used to measure distances to many of the galaxies. "These distances give us another view of the dark universe," says Professor Carlton Baugh at the University of Durham who is responsible for generating detailed Euclid simulations. "Looking at a 3-D picture of the universe is a lot more interesting." 

Nasa recently signed an MOU with ESA, outlining its contribution to the mission. The US agency will provide 20 detectors for the near-infrared instrument, which will operate alongside a visible-wavelength camera. The instruments, telescope and spacecraft will be built and operated in Europe. Nasa has also nominated 40 US scientists to become members of the Euclid Consortium, who will build the instruments and analyse the science data returned from the mission. The consortium already includes almost 1,000 scientists from 13 European countries and the US. 

Euclid is optimised to answer one of the most important questions in modern cosmology: why is the universe expanding at an accelerating rate, rather than slowing down due to the gravitational attraction of all the matter in it? The discovery of this cosmic acceleration in 1998 by teams of US, European and other international scientists was rewarded with the Nobel prize for physics in 2011

Originally i found this add on 

http://timesofindia.indiatimes.com/tech/personal-tech/computing/Biggest-digital-camera-that-can-scan-two-billion-galaxies/articleshow/21019618.cms