Sheldon: It’s very simple. Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitates lizard, lizard eats paper, paper disproves ...

Side-blotched lizards probably don’t call the game that, but they play a version of it anyway. A new study explains the hidden biology that makes this possible. By Carl Zimmer If you live in the ...