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A strange circle on satellite maps turned out to be a 390-million-year-old impact crater

An amateur astronomer searching satellite maps for a Quebec camping spot accidentally discovered a massive ancient impact crater. Scientists later found shatter cones that confirmed the 25-kilometer-wide structure was blasted into Earth roughly 390 million years ago.

We haven't written up this one. ScienceDaily has the full story — the link below goes straight to it.

Read the original at sciencedaily.com →

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