![The Discovery Files show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/014/590/small/the-discovery-files.jpg)
Summary: Geologists at Harvard University found evidence that sea ice extended to the equator up to 716.5 million years ago, bringing new precision to a "snowball Earth" event long suspected to have taken place around that time.
Summary: Geologists at Harvard University found evidence that sea ice extended to the equator up to 716.5 million years ago, bringing new precision to a "snowball Earth" event long suspected to have taken place around that time.