Rats avoid hurting other rats

Most humans feel bad about hurting others. This so-called "harm aversion" is key to normal moral development and is reduced in violent antisocial individuals. Unfortunately, little is known about what makes people harm-averse, ...

Would Pain-Free Animals Make a More Humane Hamburger?

(PhysOrg.com) -- With advancements in genetic engineering, researchers say that it may soon be possible to breed farm animals that don't feel pain. The suggestion has sparked controversy on whether denying animals the ability ...

Monkeys found to wonder what might have been

(PhysOrg.com) -- Monkeys playing a game similar to "Let's Make A Deal" have revealed that their brains register missed opportunities and learn from their mistakes.