Fighting climate change can feel overwhelming, but what if action looked like something as small as planting a tree — or a forest? A forest can be grown anywhere, even in your own backyard. Shubhendu Sharma, an eco-engineer and TED Fellow, explains how.

If you think your contraception is making you anxious or depressed, you’re not imagining things. Evolutionary psychologist Sarah E. Hill explains what happens to your brain on birth control.

There’s probably no question that sleep scientist Wendy Troxel gets asked more frequently than “Is it bad if my partner and I sleep apart?” Here, she tells us what the research says about couples and sleep.

Which is the bigger threat to wildlife: Radioactivity or humans? Wildlife ecologist Jim Beasley has gone into the contaminated zones around Chernobyl and Fukushima to learn the answer, and his findings are both sobering and inspiring.

You’ve probably seen people’s eyes glaze over when you were talking about a complex topic, and you’ve done the same thing yourself. But that doesn’t mean some things are just too confusing to convey. Physicist Dominic Walliman tells you how to share what you know in a way that will land with others.

Is CBD a cure-all — or snake oil? Jeffrey Chen, executive director of the UCLA Cannabis Research Initiative, explains the science behind the cannabis product.

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.