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5 votes

Why hasn't all the water on earth evaporated and been frozen at the poles?

Frozen glacial ice flows downhill; even if the catchment (where the snow falls) never rises above freezing the ice there still flows towards oceans, ie does not stay where the snow fell. The edges of ...
Ken Fabian's user avatar
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6 votes

If the Pacific Ocean is 750 million years old, Why can't oceanic crust be older than 200 million years?

Expanding on @Jean-Marie Prival's comment: Basically, on geological timescales the ocean has a convener belt of oceanic crust underneath it, where new crust forms and old crust is destroyed. This ...
Mehmet Karatay's user avatar

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