An Ancient Ice Age Froze the Entire Earth–and Helped Humanity Flourish | Hacker News

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		An Ancient Ice Age Froze the Entire Earth–and Helped Humanity Flourish (lithub.com)
		5 points by bookofjoe 48 days ago \| hide \| past \| favorite \| 1 comment

andsoitis 48 days ago [–]

An ice age is when Earth has permanent ice sheets at the poles for millions of years.

We are currently in an ice age, specifically the Quaternary Ice Age, which began about 2.6 millions years ago.

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