From CBS News:
The maps of Pluto reveal a mottled brown and charcoal surface.
Sun activity rises and falls in an 11-year-long cycle, such as this cycle from top left taken in early 1997 to bottom right, taken in early 2000. Credit: NASA
Teeth from a site near Cuzco, Peru, show grooves of enamel damage.
AH-64A Apache Helicopter (Photo by Getty Images/Don Farrall)
The complex story of oxygen's rise (Image: Reso/Rex Features) 
From The BBC:
From Wired Science:
From The New York Times:
A medical assistant draws an MMR vaccination at the
Phytoplankton. (Credit: NOAA MESA Project)
From Live Science:
Rescue carries its own dangers (Image: Roberto Schmidt/Getty)
'Vegetative state' brain scan images:: the fMRI images which were
Solar flares erupting from the surface of the Sun fling billions of tonnes of electrically-charged matter towards the Earth in a solar storm. ESA/ASA
F-35
Lung cancer cell
From Science Daily:
The extinct giant snake, called Titanoboa (shown in an artist's reconstruction), would have sent even Hollywood's anacondas slithering away. Credit: Jason Bourque.
The Avenue of Sphinxes in front of the Luxor Temple. Photo by Jennifer Willoughby
Snacking on comets (Image: HST/NASA)
Friends: Andrew Armour and Scar the sperm whale consider one another solemnly as they swim in the waters off Dominica last weekend
Finding Antibodies Medical hide and seek could get a boost from Google Tolerx, Inc 
Cassini completed its initial four year mission to explore Saturn in June 2008.
New research identifies the 'speed gene' contributing to a specific athletic trait in thoroughbred horses. (Credit: iStockphoto/Derek Dammann)
A boxer punching. Credit: stockxpert
Image: Death of a tumor: This PET scan, taken just days after radiation therapy, shows a hot spot of cell-death activity in a brain tumor--a good indication that the therapy is working. Credit: Aaron Allen, Davidoff Comprehensive Cancer Center, Rabin Medical Center 
From CNET News:
Robot Frigates Now imagine this ship without the people U.S. Navy/Scott Taylor
Photo: The team used Nasa's Nasa's Infrared Telescope Facility in Hawaii 
From The Economist:
From PC World:
This is a NASA Hubble Space Telescope picture a comet-like object called P/2010 A2, which was first discovered by the LINEAR (Lincoln Near-Earth Asteroid Research program) sky survey on January 6. The object appears so unusual in ground-based telescopic images that discretionary time on Hubble was used to take a close-up look. This picture, from the January 29 observation, shows a bizarre X-pattern of filamentary structures near the point-like nucleus of the object and trailing streamers of dust. The inset picture shows a complex structure that suggests the object is not a comet but instead the product of a head-on collision between two asteroids traveling five times faster than a rifle bullet (5 kilometers per second). Astronomers have long thought that the asteroid belt is being ground down through collisions, but such a smashup has never before been seen. (Credit: NASA, ESA, and D. Jewitt (UCLA))
An artist's concept of the Orbiting Carbon Observatory. Credit: NASA
There is no evidence that vaccines cause autism. Credit: iStockphoto
From CBS News:
Bestseller: The iPad features iBook, an application for buying and reading books.
