Astronauts

Even a tiny fragment traveling at 17,400 mph could have devastating effects.

An astronaut on the lunar surface could receive a dose of radiation thousands of times higher than on Earth.

The telomeres, which are chromosome structures that shorten with age, of the four crew members actually lengthened.

On Wednesday night, the International Space Station radio caused a significant unintentional stir.

While lying down for two months may sound like easy money, it may be harder than it appears.