The period lasted 200,000 years before the world was able to return to a "normal" temperature. Today the average global temperature is around 15-16 degrees Celsius, but in the Paleocene it was ...
Ebersole said they were able to determine the shark came from the Paleocene period because of the geological layer it came out of which is just above the Cretaceous-Paleogene (K/Pg) boundary.