Reading the same books, playing the same games, asking the same questions. Kids' fascination with repetition can be exhausting for parents, but researchers say it's key to brain development.

The influential and sometimes controversial Harvard professor first made his name studying ants. He later broadened his scope to the intersection between human behavior and genetics.

Officials may be relying on people to do their part to stop the spread of COVID-19 at a time when the public is simply not afraid enough anymore to keep up the recommended behaviors.