Your research team has found a prehistoric virus preserved in the permafrost and isolated it for study. After a late night working, you’re just closing up the lab when a sudden earthquake hits and breaks all the sample vials. Will you be able to destroy the virus before the vents open and unleash a deadly airborne plague?

From TED Ed and Lisa Winer: Can you solve the virus riddle? Be sure to hit pause at 1m41s, grab a pen and paper, and try to solve the challenge before the solution is explained.

Related reading: A Hamiltonian path and the Icosian game. Plus, try the Knight’s Tour, and more TED Ed riddles.

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