Jupiter May Have Destroyed The Solar System's First Planets

It is becoming increasingly obvious that our Solar System — with its inner collection of small rocky planets and an outer region buffeted by gas planets — is quite uncommon. According to a remarkable new study, the reason may have to do with Jupiter and an ancient migratory journey that kickstarted the destruction of… » 3/24/15 8:00am Tuesday 8:00am

An Astronaut Tells Us The Hardest Part About Coping With Gravity Again

When you leave the bounds of Earth behind, you're also saying goodbye to gravity. So just what is it like to return from space and get gravity back all of sudden? Today, Astronaut Butch Wilmore, who until last week was stationed up on the International Space Station, stopped by to tell us all about it. » 3/19/15 4:20pm 3/19/15 4:20pm