For decades, research into drugs like LSD, MDMA and psilocybin was banned. Now it’s time to shed our old fears and fully investigate their potential for treatments that could benefit people with PTSD, depression, substance abuse, and more, says psychedelics expert Rick Doblin.

Emerging research suggests that retirement could lead to a decline in your cognitive function, says gerontologist Ross Andel. Anyone who’s retired or thinking about retirement should read this to learn more.

Babies start laughing before they can speak, and this delicious sound just may serve as a powerful source of human communication and connection, says psychology researcher Caspar Addyman.

Researchers have identified many things — such as unpredictable laughter and unkempt hair — that we find unsettling in others. But they’ve also realized this: We humans are pretty poor judges of who we should trust, says psychologist Julia Shaw.

By creating tech that lets dolphins play computer games and request belly rubs, we can understand their intelligence and perhaps even get a preview of life on other planets, says marine mammal researcher Diana Reiss.

Essential, data-derived advice for leading a happy, healthy life, shared by psychiatrist Robert Waldinger.

In the Appalachian firefly Photinus carolinus, flying males flash in synchrony with their neighbors, creating a symphony in light. Photo by Radim Schreiber.

Sara Lewis studies fireflies. And it turns out they’re not just a pretty flashing light on a summer night. She explains how a firefly glows — and how humans are harnessing that glow for health and medical research (and even to make our food safer).