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Perhaps you’ve heard stories of cow tipping. People—usually young men and perhaps after a few beers—go into fields full of cows, which are all sleeping standing up. A person quietly creeps up to one of the cows and heaves with all his might. The cow falls over and is stuck on her side, unable to lift her massive body. But are these stories true?

No, they’re not. Cow tipping is impossible for a few reasons.

Cows sleep lying down.

The notion of cow tipping is based on the idea that cows sleep standing up. They don’t. Cows lie down not only to catch their approximately four hours of sleep per day but also to rest and chew their cud. All told, cows spend 8–12 hours each day lying down, often in 1–2 hour bursts.

Cows (can) weigh a ton.

Adult cows weigh anywhere from 800 to 2,400 pounds (360 to 1,100 kg), depending on the breed. That’s a lot more than most people can push over. One zoology student at the University of British Columbia tried to put numbers to the problem in 2005. With the help of her professor, she calculated that it would take at least two people to knock over a cow if the cow stood perfectly still. But if the cow braced herself at all, it would become significantly more difficult.

Cows move.

Cows are very unlikely to stay in one place when someone is trying to push them over. Cows might not even let a person get close. As prey animals cows are adept at sensing potential danger and are generally wary when large predators, such as a group of humans, approach them at night.