In today’s newsletter: Tips for longevity from the world’s oldest doctor. Plus, a worrying new study on marijuana, and why humidity feels so uncomfortable.

But first: 10 ways to manage extreme heat. 

Climate change is making heat more extreme—and it’s making extreme heat more likely. From changing how you read weather forecasts to the downside of fans, here are 10 practical ways to manage life in the heat.

More stories:
— Here’s what extreme heat does to the body
— What is a heat dome? How this phenomenon is reshaping summer as we know it. 

Howard Tucker has been practicing medicine since 1947. Ahead of his 103rd birthday, the neurologist shares his secret to longevity with National Geographic. Here are his tips for better health and the habits he believes everyone should avoid.

As marijuana has become increasingly mainstream in the United States, researchers are raising concerns about a growing list of potential health risks. Now, a new study is adding a potentially deadly concern.

BEFORE YOU GO: Does sunscreen expire? How much SPF is enough? Your burning questions, answered.

Today’s newsletter was edited and curated by Jennifer Baik and produced by Alisher Egamov. Did someone forward this to you? Sign up here to get this newsletter and more.