This week: Why olive oil is so powerful, the best way to keep mosquitoes away, meet the man with the (literal) keys to the Vatican, and seven more stories we love.

IMAGE COURTESY ROBERT L. HURT/CALTECH/IPAC

PHOTOGRAPH BY MINISERIES, GETTY IMAGES

Ever been told to “take a deep breath” during a stressful moment? That advice is backed by science. Here’s why mindful inhaling and exhaling can be so good for you, plus which breathing techniques are best and how to ensure you’re doing them safely and effectively.

ONE LAST THING: Why is there a 10,000-person wait list to search for riches in London's Thames?

Today’s newsletter was edited and curated by Jennifer Baik and produced by Alisher Egamov. Let us know if you have suggestions and sign up here to get the Photo of the Week on Sundays.