From American Scientist:
Photo: A UNIVERSE OF MYSTERIES: Why aren't there suns, planets and galaxies made of antimatter? NASA
Flexible Inorganic LED Pacific Northwest National Lab via Ars Technica
STS128-S-002 (30 Jan. 2009) --- Attired in training versions of their shuttle launch and entry suits, these seven astronauts take a break from training to pose for the STS-128 crew portrait. Seated are NASA astronauts Rick Sturckow (right), commander; and Kevin Ford, pilot. From the left (standing) are astronauts Jose Hernandez, John "Danny" Olivas, Nicole Stott, European Space Agency's Christer Fuglesang and Patrick Forrester, all mission specialists. Stott is scheduled to join Expedition 20 as flight engineer after launching to the International Space Station on STS-128.
Space shuttle Discovery back on Earth (AFP: Pierre Ducharme)
Normal location of the appendix relative to other organs of the digestive system (frontal view). (Credit: Wikimedia Commons)
A graphic shows what's inside your joints, and what can go wrong.
Playlists can give an insight into your personality Photo: GETTY IMAGES
From CNET:
The Asian predatory wasp could threaten bee-keepers' livelihoods
Into the woods. People walking through a forest were more likely to walk in circles on cloudy days (blue paths) than they were on days when the sun was visible (yellow paths). Credit: (Map) Adapted from Google Earth by J. L. Souman et al., Current Biology 19 (20 August 2009); (inset: Jan Souman)
Fossils are seen in the Bentiaba desert, southern province of Namibe in Angola. Much of Angola's fossil richness results from dramatic continental shifts tens of millions of years ago, which saw the land transform from desert to tropics. (AFP/HO/File/Anne Schulp)
Smile for Airplane Safety!: Curtiss P-40 Warhawk USAF Museum 
ZERO IN: The number zero developed in fits and starts over thousands of years.
The dense star cluster RCW 38 glistens about 5500 light years away in the direction of the constellation Vela (the Sails). RCW 38 is an "embedded" cluster, in that the nascent cloud of dust and gas still envelops its stars. (Credit: Image courtesy of ESO)
Breakthrough: New DNA was protected by a process called methylation (step 5)
Mars as seen near opposition late August 2003, by the Hubble Space Telescope
Aerial view of LIGO facility in Livingston, Louisiana.
The spiral bands of Hurricane Bill in the Atlantic Ocean fill the view as Expedition 20 crew members on the International Space Station look east-southeastward along the horizon. This view was taken on Aug. 18, 2009 at 16:08:54 GMT with a Nikkor 28-70mm zoom lens at the 40mm lens setting. At the time this photograph was taken, Hurricane Bill was centered at 15.9 degrees north latitude and 51.2 degrees west longitude, the winds were 90 knots (103.7 miles per hour) gusting to 110 knots (126.7 mph) and it was moving west-northwest (285 degrees) at 14 knots (16.1 mph). Credit: NASA
A worker cleans an Aquapod fish cage off Peurto Rico in an undated photo. Another Aquapod has been outfitted with remote-control propellers. Someday such automated cages could herald an entirely new form of fish farming, with robotic cages roaming the seas, mimicking the movements of wild schools. Photograph courtesy Ocean Farm Technologies 
The average video gamer: Players are typically 35, overweight and suffering from depression, and rely more on the internet for social support (file pic)
From L.A. Times:
Shape-shifter: The Z-wing configuration allows the
From Wired Science:
Photodisc / Getty
The concept of dark energy was created by cosmologists to fit Albert Einstein's General Theory of Relativity into reality Photo: AP
From The BBC:
The supercomputer Hal in Stanley Kubrick's 2001: A Space Odyssey embodies our worst fears about autonomous machines. Photograph: RGA
The map shows groundwater changes in India during 2002-08, with losses in red and gains in blue, based on GRACE satellite observations. The estimated rate of depletion of groundwater in northwestern India is 4.0 centimeters of water per year, equivalent to a water table decline of 33 centimeters per year. Increases in groundwater in southern India are due to recent above-average rainfall, whereas rain in northwestern India was close to normal during the study period. (Credit: I. Velicogna/UC Irvine)
From Live Science:
Credit: Technology Review 
Image: Still grounded (Image: Boeing) 
Photo via Pathways of Altruism
Two USGS scientists analyze fish for mercury in the St. Marys River in northern Florida.
SunFlower Solar Panels: This isn't your mother's garden. David Newsome/GOOD Magazine 
From The Economist:
From Stltoday.com:
Personality traits associated with chronic worrying can lead to earlier death, at least in part because these people are more likely to engage in unhealthy behaviors, such as smoking, according to research from Purdue University. (Credit: iStockphoto/Mikael Damkier)
A photo and depiction of the pterosaur tracks that suggest an ancient landing strip.
Space Shuttle Discovery
The 25ft-long car will race across the desert in California to try and break a land speed record.
Photo: White spaces: Accessing the Internet over unused portions of TV spectrum could provide good long-range connectivity in rural areas, and help fill in gaps in city networks. Microsoft researchers tested a new protocol, called White Fi, using the device shown here. Credit: Microsoft Research