The cold periods - or ice ages - are times when the entire Earth experiences notably colder climatic conditions. During an ice age, the polar regions are cold, there are large differences in ...

The warmth of the long summer afternoons of the most recent ice age sent great freshets of glacial meltwater, milky white with suspended rock flour, into Glacial Lake Missoula. Rock flour settled ...

See also how these coasts looked 20,000 years ago at the height of the Ice Age, when seas were 400 feet lower than today, as well as how they would appear if the much larger East Antarctic Ice ...

They also stand in three decidedly different camps regarding why America's rich complement of big animals went extinct quite suddenly at the end of the Ice Age. The three camps are known tongue in ...

The Clovis were a prehistoric people who flourished in North America at the end of the Ice Age, hunting mammoths and other big game with spear points not unlike this one. To make the point ...

How would you like to have a time machine that could take you back anywhere over the past 300,000 years? You could see what the world was like when ice sheets a thousand feet thick blanketed ...

Remarkable time-lapse footage reveals massive glaciers and ice sheets ... funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.

Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers ... a golden age of discovery, but our knowledge of these ice worlds is ...