Millionaire Harris Rosen adopted an urban neighborhood in Florida, giving all families daycare, boosting the graduation rate by 75%, and cutting the crime rate in half.

The first “true” alphabet appeared around the 8th century BCE, when the Ancient Greeks borrowed the Phoenician alphabet and adapted it to their own language, giving equal status to vowels and consonants.

In 2010, Bill Gates and Warren Buffett signed the “Giving Pledge,” promising to give half of their wealth to philanthropy, either during their lifetime or upon their death. Over 150 signers have joined since.

In 1956, a scientist imported African honeybees to South America. Some of them escaped and bred with European honeybees in the wild, giving rise to a hybrid species: killer bees.

The earliest recorded case of a man giving up smoking was on April 5, 1679, when Johan Katsu, Sheriff of Turku, Finland, wrote in his diary “I quit smoking tobacco.” He died one month later.

Lionesses are caring mothers who will even take care of a neglected cub, allowing him/her to suckle and giving them a chance to survive. Two or more lionesses in a group tend to give birth around the same time, and the cubs are raised together. Cubs are extremely playful.