New research is challenging the long-held position that comets and asteroids are as different as lions and lemurs. ...more

January 25, 2008

Scientists in Maryland on Thursday said they had built from scratch an entire microbial chromosome, a loop of synthetic DNA carrying all the instructions that a simple cell needs to live and reproduce. ...more

January 25, 2008

Intensive farming of salmon for American dinner plates is threatening some wild salmon populations with imminent extinction, according to the most detailed study ever done of the contentious issue. ...more

December 28, 2007

The NASA spacecraft on the way to Pluto has discovered lightning in the polar regions of Jupiter, scientists said Tuesday. It also found that the volcanically active moon Io belches out tons of material that travels hundreds of millions of miles down Jupiter's long magnetic tail. ...more

October 13, 2007

Attacking several tons of woolly mammoth with stone-tipped spears must have taken extraordinary courage - and ancient people left paintings to prove they did it. ...more

September 30, 2007

Oxygen, key to life on Earth today, began to appear on the planet millions of years earlier than scientists had thought, new research indicates. ...more

September 30, 2007