SSS 2010-10-13

（单词翻译）

This is Scientific American’s 60-Second Science, I’m Karen Hopkin. This will just take a minute.

Blackjack, slot machines, good ol’ Texas hold’em. People love to gamble. And we’re not the only ones. A new study shows that pigeons will also pass up a sure thing in the hopes of a big payoff. The work appears in the Proceedings¹ of the Royal Society.

Theories about foraging² say that animals should stick with the proverbial bird in the hand, especially when it comes to food. Eating is key to survival, so clever critters shouldn’t take unnecessary chances. But these new findings suggest that pigeons don’t always play it safe.

Scientists set up an avian casino in which pigeons could place their bets on one of two symbols. Peck at symbol 1 and you get three food pellets. Never more, never less. Symbol 2 was the wildcard. Choose that one and 20 percent of the time, you’ll hit the jackpot: 10 food pellets. The rest of the time you’ll get nothing. But the lure³ of the big win was too hard to resist: pigeons chose to gamble more than 80 percent of the time, even though, on average, that path paid out fewer pellets.

Perhaps it’s the joy of a pleasant surprise. Because even for a literal bird brain, hitting the lottery⁴ is a hoot⁵.

Thanks for the minute, for Scientific American’s 60-Second Science. I’m Karen Hopkin.