The growing number of tweets per day (Source: Twitter) 
This image shows dark sand dunes and inverted craters in the Arabia Terra region of Mars. The sand is dark because it was probably derived from basalt. The 'inverted' shape is found on Mars and Earth where erosion has stripped away surrounding topography
An artist's rendering of the moment of impact when an enormous space rock struck the Yucatán peninsula at the end of the Cretaceous Period. (Credit: Don Davis, NASA)
From Live Science:
Photo: HTC was the first manufacturer to use Android in its phones
From Discover Magazine:
When unmanned aircraft can refuel one another, their time on a mission will be dramatically extended. The Air Force Research Laboratory is spending $49 million over the next four years to create a system that will allow UAVs to autonomously refuel in the air, as seen in this 2007 RQ-4 Global Hawk test.
Charles Simonyi Prepares for Space Courtesy of Space Adventures and Charles Simonyi 
Now you see it: a near-Earth object becomes visible in infrared
Astronaut Nicholas Patrick holds onto the International Space Station's cupola during a February spacewalk. Reuters
Digital sequencing systems can capture vast amounts of genetic data, but interpretation has been difficult. Credit: Monty Rakusen/Getty Images
An HTC smartphone (right) alongside an Apple iPhone. Apple are suing HTC Corp for infringing on hardware and software patents
The newly discovered red giant star S1020549 dominates this artist's conception. The primitive star contains 6,000 times less heavy elements than our Sun, indicating that it formed very early in the Universe's history. Located in the dwarf galaxy Sculptor some 290,000 light-years away, the star's presence supports the theory that our galaxy underwent a "cannibal" phase, growing to its current size by swallowing dwarf galaxies and other galactic building blocks. (Credit: David A. Aguilar / CfA)
From The BBC:
From Discover Magazine:
There'll be little warning if Earth's magnetic field flips (Image: NASA/SPL)
Rachmaninoff, Back at the Piano Where He Belongs Zenph 
Photo: 16,000 online traders accept payments via Buxter's parent company.
From Cosmos/AFP:
From Times Online:
Researchers studying the dog genome have a new understanding of why domestic dogs vary so much in size, shape, coat texture, color and patterning. (Credit: iStockphoto/Nataliya Kuznetsova)
The newly identified dinosaur relative, called Asilisaurus kongwe, was about the size of a large dog. Here a skeletal reconstruction of the animal is compared with a 5'6" human for scale. Credit: Sterling Nesbitt.
A colossal statue of Amenhotep III - King Tut's only grandfather - can
Michael Chertoff, former Secretary at the US Department of Homeland Security
Touching the multiverse (Image: Eoin Ryan)
Chiba University's Latest Hummingbird 'Bot Chiba University 
From The BBC:
From The Orlando Sentinel:
By David Goldman, staff writer
From Times Online:
Antarctica's Ross Ice Shelf, like many of the fringes of the Antarctic continent, floats. That makes it fragile compared to ice on the continent, and this is where icebergs break off in a process called calving. Credit: Michael Van Woert, NOAA NESDIS, ORA
Six of the eight Hurlburt siblings live in New England, including Peggy (79), Helen (88), Millie (93), Peter (80), Agnes (96) and Muriel (89). Jason Grow for TIME
The Pyramid of Behenu at Saqqara. SCA
Lord Mandelson's plans to tackle illegal filesharing have received widespread criticism Photograph: Andrew Winning/Reuters
From The Hill:
Cybersecurity Chief Howard Schmidt said he wants the U.S. to become "stronger through stronger technology." Lawrence Jackson/White House 
A Chinese national flag sways in front of Google China's headquarters
Asilisaurus kongwe from the Middle Triassic of Tanzania, with the sail?backed archosaur Hypselorhachis in the background Photo: Marlene Donnelly/Field Museum 
'Smile at him broadly': The most effective female technique for drawing a man's attention, according to a flirting study (posed by models)
NAU geographer Erik Schiefer surveys a debris-covered glacier margin.
Biomedical engineering professor Zheng Ouyang (left), chemistry professor Graham Cooks and post-doc Guangming Huang with a mass spectrometer that is fitted with a DESI ion source. The system is used for high-throughput screening of foodstuffs for melamine, and related trace analysis experiments, using ionization of whole samples such as milk, biological tissue, or even a suitcase. Credit: Purdue News Service
Photo: Internet rights: Dick Durbin and Nicole Wong, vice president and deputy general counsel of Google, at a hearing of the Subcommittee on Human Rights and the Law.
An artist's impression of VASIMR - a rocket that may cut down the
In many mammals the entire sperm enters the egg, bringing proteins that may influence development (Image: Thierry Berrod/Mona Lisa Production/SPL)
