A strange extinction event followed by reports of a UFO sighting. Is this real evidence of alien abduction or just a mystery ...

Methane released in exhaust could move from one lunar pole to the other in less than two lunar days, with roughly half of it eventually depositing in areas that may preserve the original chemical ...

This video examines three animal reintroduction efforts that failed despite careful planning and strong intentions. Each case ...

"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if ...

Red Dead Redemption 2 is full of unexplained mysteries. Let's take a look at the creepiest of them in Rockstar’s majestic ...

New photos show off NASA's newly constructed Roman Space Telescope, which will soon help researchers unravel the mysteries of ...