ice age

The land bridge remained until about 8,000 years ago, after the end of the last ice age, when rising sea levels eventually cut Tasmania off from the Australian mainland.

He and a colleague hypothesized the tree might have first sprouted during the end of the last ice age, when the climate was much cooler.

The Garvellach islands off the west coast of Scotland are the best record of Earth entering its biggest ever ice age around 720 million years ago, researchers have discovered.

This endangered California species has survived ice ages, livestock disease and climate change.

And this flexibility is probably what “kept them going when they were dealing with ice ages, all kinds of environmental changes to their feeding grounds over the last several thousand years.”