SPACE

The letter may solve a centuries-long mystery.

Joe Barnard is the Elon Musk of model rockets.

In the 1980s and well into the 1990s, everything associated with Arnold Schwarzenegger was big. Big biceps (22 inches during his bodybuilding heyday).

Few celestial objects have fascinated humankind throughout history more than the Red Planet. Here's what you need to know about Mars.

The spacecraft will use a robotic arm to scoop up a sample of Bennu and then return it to Earth.

Huge news for future Moon explorers.

Let's review why and how we've known for at least 2300 years that the Earth is round.

Apollo 11 launched on July 16, 1969, on its way to the moon.

You won't notice it, though.

Their theories are based on the idea that a "universal grammar" might hold true for both aliens and humans.

Would you have been qualified to be an astronaut back in 1958?

At the heart of this nebula lies a star that's larger and brighter than our Sun.