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Re: [Phys-L] snowball Earth

[Phys-L] snowball Earth
Anthony Lapinski <>Thu, Apr 15 at 11:27 AM

- While I was discussing the Hubble Law and expansion of the universe today
in my astronomy class, a student (senior) asked me an unrelated question
about the snowball Earth idea - that the Earth's surface was completely
frozen in the past, much more than a typical "ice age." How could this
happen? Is there any strong evidence for this? Does anyone teach this idea
or know of good research/papers (appropriate for high school kids)?

I found that the NASA piece and the Wikipedia piece were quite accessible.The latter is replete with 95 citations