Thank you for submitting your questions last week for the world’s oldest practicing doctor, the 102-year-old neurologist, Dr. Howard Tucker. His tips for longevity were awesome, so we can’t wait to see how he responds to your provocative questions!  

In today’s newsletter, we hear from the scientists studying real human superpowers and look at the research into how singing can treat cognitive disorders. 

But first, how did we all end up having to worry about crooked teeth?

Braces, rubber bands, even jaw surgery—millions endure them in pursuit of a straighter smile. But were misaligned smiles always this common? Researchers are exploring how evolutionary biology, diet, and modern lifestyles may have reshaped our faces—and our smiles.

Superpowers are real. Okay, maybe humans can’t leap tall buildings in a single bound like Superman, but our bodies and brains hold the potential for many seemingly superhuman feats, scientists say. And we're just starting to learn what’s going on inside the bodies and minds of people with these and other heightened abilities.

Today’s newsletter was edited and curated by William O'Connor and produced by  Amanda Petty. Did someone forward this to you? Sign up here to get this newsletter and more.