June 4, 20194:36 PM ET
Heard on All Things Considered
There was a time when life on Earth almost blinked out. The “Great Dying,” the biggest extinction the planet has ever seen, happened some 250 million years ago and was largely caused by greenhouse gases in the atmosphere. Now scientists are beginning to see alarming similarities between the Great Dying and what’s currently happening to our atmosphere.
Scientists are highlighting that similarity in a new exhibit at the Smithsonian National Museum of Natural History in Washington, D.C.
[To contrast the understanding of scientists about our desperate circumstance with that of the public, see the NPR report on ATC on the same program of 4 June 2019:]