The Permian-Triassic mass extinction occurred 252 million years ago. It is Earth’s most devastating mass extinction event with up to 96% of all marine species and 70% of land animals becoming extinct. Researchers now believe they know what caused it and why life took over 5 million years to recover – extreme, lethal temperatures up…
Category: Meteorology and Weather
What causes that unique rainy smell after it rains?
It’s that distinctive earthy, musky scent that occurs after a good rain, and it has a name unbefitting its pleasant smell – “petrichor”. The petrichor odor is distinctive (and difficult to duplicate) because there are several sources/causes for the smell, including the force of the rain striking the soil and storm winds stirring everything up.…








