If alien life is out there, it may be able to exploit more-extreme environments than scientists think, because huge gravitational forces don't seem to pose much of a problem for microbes. Full story
From 220 miles above Earth on the International Space Station, American astronaut Ron Garan certainly has a unique perspective of our home planet. Full story
TODAY's Dylan Dreyer takes a helicopter ride with NASA scientists as they monitor melting ice caps and glaciers in Alaska in hopes of protecting beaches and shorelines for the future.
NASA is working on a radar system to track asteroids that pose a danger to Earth. WESH’s Dan Billow reports.