Scientist's Bee Experiment Accidentally Unleashed Killer Bees

In the 1950s, a scientist named Warwick Estevam Kerr wanted to create better honey bees for Brazil.

He thought mixing European and African honey bees would make them stronger and more productive.

In 1956, he brought African queen bees to Brazil.

But in 1957, a mistake let 26 queen bees escape.

These bees spread quickly across South and Central America, reaching the United States by the 1990s.

They are more aggressive and can be dangerous, but they are also very good at surviving in hot climates.

Kerr's experiment changed how people think about bees and showed how small mistakes can have big effects on nature.