Jeff Bezos' secretive Blue Origin space firm yesterday became the first to launch a rocket into space and guide it safely back to a landing on earth, ushering in the long-anticipated era of the reusable rocket.

Some scientists want to send messages into space in the hope of piquing alien interest. But might it attract the kind of attention no civilization wants?

A huge asteroid that could wipe out human life is heading for our planet. And it's just one of more than a half million near-Earth objects in our solar system. 

On July 20, 1969 three U.S. astronauts landed on the moon, and now NASA wants to go to Mars — for all the benefits — disregarding all the costs.

Google has expanded its ability to keep an eye on everyone by buying "eye-in-the-sky" technology from Skybox.

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