Happy to fly
The shooting of US congresswoman Gabrielle Giffords last month led her husband, NASA astronaut Mark Kelly, to consider resigning his command of a shuttle mission set for April. But with Giffords now recovering, Kelly resumed training on Monday. The mission will deliver a long-awaited cosmic ray telescope to the International Space Station.
Tiny flea, big genome
It may be just 5 millimetres long, but the water flea packs in more genes than any species yet sequenced. With 30,907 genes, Daphnia pulex has at least 5000 more than humans, many newly evolved to help the fleas…
