A rover found building blocks for life on Mars, NASA announced this week, but our fascination with alien life on the red planet began long ago.
The U.S.-Soviet space race had many notable successes, but some deadly catastrophes, too.
NASA's InSight mission, which will dig into the planet's core, is the latest to explore for signs of life on the red planet.
Although he was not alive to see it happen, getting an American to the moon was John F. Kennedy's ultimate dream.
The puppeteer inside the yellow suit was in talks to go to space.
The Challenger launched too early—in part, because Reagan wanted to give a speech about it.
These aspiring astronauts were part of the little-known “Mercury 13” program.
These aspiring astronauts were part of the little-known 'Mercury 13' program.