Cassini starts preparing for its sensational grand finale
The spacecraft is moving to higher altitudes in preparation for its last year.
Marvin Minsky, A.I. pioneer, dies of brain hemorrhage at 88
He cofounded and taught at MIT's artificial intelligence lab in addition to inventing key research equipment.
'The Martian' VFX reel shows how they put Matt Damon on Mars
Watch how a visual effects company made the film seem real.
Hubble shows some of the galaxy's biggest, brightest stars
Some are so intense that they'll go supernova within a few million years.
Lockheed Martin works on smaller, more powerful telescope tech
SPIDER uses thousands of tiny lenses to peer into space.
Astronaut Scott Kelly hosts a Reddit Q&A from space at 4PM ET
NASA's Space Station veteran wants you to ask him anything.
Jeff Bezos' Blue Origin sent its rocket to space... again
SpaceX went further, but Blue Origin has struck back by actually re-using a rocket.
It's a conspiracy! You want to believe
The truth may not be out there -- it may be all in your head.
SpaceX Dragon capsule proves it can hover
But can it land?