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EARTH Magazine - asteroid

When it comes to mass extinction events, what seems like a simple tale — for example: dinosaurs die, mammals take over — is much more complicated. But extinctions aren't random, either: Written in the rocks are certain "rules" these events seem to follow.

Some scientists say giant, wedge-shaped sandy deposits on the coast of southern Madagascar are evidence of a giant tsunami spawned by an asteroid strike 10,000 years ago. But new research suggests these deposits were formed by winds, not mega-tsunamis.

Your Turn EARTH Poll

Do you pay attention to where your seafood comes from?

Yes, I only eat sustainably farmed/fished seafood.
Yes, I try to eat sustainable seafood, but not always.
Yes, but it doesn't change my behavior at all.
No, I don't care where it comes from.
No, I don't eat seafood.
Don't know.