• February 15, 2012

jurassic beaver.JPGBut it’s late in the blogging day, and we’re too tired to come up with one — so please make up your own punchline, and put it into the comments for this post. (Or send us a clever punchline by email, and we’ll send you some comment invites in return.)

Update: As explained here, we are no longer accepting new “Jurassic beaver” punchlines. But we thank you for your interest.

‘Jurassic Beaver’ Turns Theory on Its Tail [CNN]

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