It's turns out to be much easier to simulate a grandmaster chess player than it is to simulate a 2-year-old.

Developmental scientists like me explore the basic science of learning by designing controlled experiments.

What happens when children reach puberty earlier and adulthood later? The answer is: a good deal of teenage weirdness.

Preschool kids learn best when exploring, but kids in school learn best when they do things, interacting with a master. Unfortunately, our schools don't do much of either. Also, kids do need to learn how to deal with technology, and online education and otherwise using electronic devices as learning tools facilitates that.

To support the people we care about is intrinsic, it is not instrumental. It's not something we do because we're hoping to get some other outcome.

What's it like to be a baby? It's like being in love in Paris for the first time after you've had three double espressos.

Adults often assume that most learning is the result of teaching and that exploratory, spontaneous learning is unusual. But actually, spontaneous learning is more fundamental.