Add Yahoo as a preferred source to see more of our stories on Google. A SpaceX rocket launch. SpaceX Humans launched a record number of objects into space last year, from satellites to probes to ...

U.S. Space Command is tracking almost 35,000 objects in low Earth orbit, a 22 percent increase from just two years ago, Lt. Gen. Stephen Whiting, the head of Space Operations Command said Wednesday.

Humans and animals have a "number sense," an inborn ability to register the number of objects in a scene. The neural basis of this ability is believed to be what are called the number neurons, which ...