Fly over any baseball stadium when the home-team batter slams a double in the gap with two men on base, and you’ll see a crowd of fans rising in unison, arms waving wildly in the air. You’d think you were viewing typical baseball fan behavior.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.