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Space shuttle Endeavour finally returned to Earth Wednesday after a record-setting, nearly 16-day flight, but the traffic jam it helped create in orbit remains and is likely to get worse.

The US space shuttle Endeavour lands in Florida after a record mission to the International Space Station.

AP - Pointy-nosed crocodiles may have joined sharks as the dominant predators in the world's oceans some 62 million years ago, according to Brazilian scientists who on Wednesday unveiled one of the most complete skeletons found yet of the prehistoric Animals.

Employees at a growing number of businesses are starting and ending their days by pressing a hand or finger to a scanner that logs the precise time of their arrival and departure - information that is automatically reflected in payroll records.

Circumcision has become a booming business in Africa as more men learn of its protective effect in the fight against HIV and AIDS

Experts call for more hospital hand-washing

The shuttle Endeavour touched down after a record 12 days at the space station

A cell "silencing" technique used to cut cholesterol in monkeys raises hopes of new ways to fight many diseases.

An intriguing bright spot detected next to a star 470 light years away may indicate the presence of a developing planet

Two scientists who drew important links between local and global ecosystems -- a prescient explorer of nitrogen's wide-ranging impacts, and a central figure in the rise of international ecology -- will share the 2008 Tyler Prize for environmental Achievement.