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

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 ...

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