ake a five-minute scroll through your Instagram feed, and you’re bound to find snapshots of women’s toes peeking out from their bathwater, selfies modeling their latest face mask purchase, or a mini-altar decked out with enchanted crystals, candles, and incense—each image stamped with the #selfcare hashtag that’s been used over 18 million times and counting.
The term...
In the 1700s, an Italian physician figured out how to perform an eerie parlor trick. Luigi Galvani hung frog legs from a metal railing. Then, atmospheric electricity energized the severed limbs, causing them to dance and kick.
These Frankenstein-like experiments did more than captivate an audience. Eventually, they helped scientists understand how electrical impulses power human nerve...
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