DARPA picks Lockheed Martin and Blue Origin to build nuclear spacecraft

Weird 'blue' dunes speckle the surface of Mars in NASA photo

Astronomers detect a bright-blue bridge of stars, and it's about to blow

The mystery of the blue flower: Nature's rare color owes its existence to bee vision: Why is it that humans are so fond of blue? And why does it seem to be so rare in the world of plants and animals?