After a week and a half of complex orbital construction work, Endeavour's seven astronauts undocked from the international space station and began their journey home.
A magnitude 4.1 earthquake struck northwestern Wyoming near Yellowstone National Park early Tuesday morning.
Shuttle Endeavour pulled away from the international space station on Monday and headed for home after a heartfelt farewell between the two crews. It culminated 12 days of shared work, the longest mission ever of its kind.
Scientists plan to put one of the twin Mars rovers to sleep and limit the activities of the other robot to fulfill a NASA order to cut $4 million from the program's budget, mission team members said Monday.
Ants took up farming some 50 million years ago, according to researchers who traced the ancestry of farmer ants.
A new study predicts water circulation in Lake Tahoe is being dramatically altered by global warming.
Unusually large waves churned by an Atlantic storm system have littered the beaches of Barbados with broken coral in what could be a sign of damage to reefs across the region.
High water pouring down the White River could cause historic flooding in cities along its path in eastern Arkansas, forecasters warned Sunday.
The crew of the space shuttle Endeavour has completed their final spacewalk, and now they are taking a day off before their return trip to earth.
Some rivers are still rising, adding to the already flooded Midwest.
Endeavour's astronauts embarked on the fifth and final spacewalk of their mission Saturday, and they have attached an inspection pole to the International Space Station that will be used by the next shuttle visitors.
A tropical storm left 5 people dead in its wake after making landfall in Bangladesh, which shares India's eastern border.
After a final inspection of Endeavour's thermal shield, astronauts aboard the linked shuttle-station complex began preparing for a Saturday spacewalk to store on the station the laser-tipped boom they used to search for damage.