youtube_video_23440915-2021-09-09-18-37-07

What exactly caused the greatest extinction on earth? New research may finally hold the answer to this long time mystery. Why Don’t Humans Have a Penis Bone? - Read More: Increased UV from ozone depletion sterilizes trees “Pine trees become temporarily sterile when exposed to ultraviolet radiation as intense as some scientists believe the Earth experienced 252 million years ago during the planet’s largest mass extinction, lending support to the theory that ozone depletion contributed to the crisis.” Thinning Ozone Layer May Have Driven Earth’s Largest Mass Extinction 252 Million Years Ago #jCp “Pine trees become temporarily sterile when exposed to ultraviolet radiation as intense as some scientists believe the Earth experienced 252 million years ago during the planet’s largest mass extinction, lending support to the theor