US astronaut Mark Kelly, who commanded Endeavour's final flight has announced his retirement to help his wife Gabrielle Giffords recover.
The discovery of a surprisingly effective "new" antibody is an exciting step forward in the hunt for a universal flu vaccine, researchers say.
A new type of heart valve made with cow tissue and inserted by catheter was hailed as a major breakthrough.
The biggest, baddest space rover ever built for exploring an alien planet is nearing its August 6 landing on Mars, and Nasa is anxious for success.
Diseases that ravage wheat fields are as old as time itself. The ancient Romans even had a legend to explain the terrible plagues.
A stink bug from Asia is chomping up US vegetable fields, orchards and vineyards, causing experts to scramble through an arsenal of weapons.
Atlantis blazed a path into history this afternoon when it blasted off on the last-ever mission of the 30-year-old US space shuttle programme.
In another step toward finding planets that might hold life, the Kepler telescope has confirmed its first habitable zone outside our solar system.
A US animal protection group has started to raise funds for a programme that will equip SA and Zimbabwe rangers with skills to better track poachers.
Nasa is tracking a piece of Soviet space debris that could collide with the International Space Station (ISS), the US space agency said on Sunday.