NASA Discovers Super Earth: Planet 4 Times Bigger Than Earth, Completes Year In 11 Days

12,000-Year-Old Human Footprints Discovered in Utah

Rover audio reveals different rules for sound on Mars. Based on noises from the rover's laser and helicopter, the speed of sound is much slower on Mars than on Earth. On Earth, sounds typically travel at about 767 mph, but on Mars, high-pitched sounds move at 559 mph and low-pitched ones at 537 mph.

Celebrate NASA's Artemis 1 mission by sharing your 'moon snaps'