Leonardo da Vinci understood the anatomy and physiology of the heart better than the physicians of his day

He made wax molds of the aortic valve.

Based on zero deaths reported from e-bicycles, NYC mayor Bill DeBlasio is outlawing them. Super. 

He says not to worry, deliveries by car (responsible for 70 deaths in NYC so far in 2017) will still be available. I'm as skeptical of e-bikes as any long-time cyclist (mopeds and golf carts on the local bike paths cause me to mumble horrible things under my breath), but this is bananas. They should stay on the streets. They're smaller, slower, and infinitely safer to their surroundings than cars.

Candy corn, aka clown droppings, explained

Candy corn is disgusting. But this article is delicious. 

McDonald's is experimenting with locking up phoneworms' devices

My grouchy side says "Your pocket is just as good a place as the Fun Zone locker." My realistic side says that most of us lack the self-control to ignore a device that's in our pocket:

According to a survey of 302 parents conducted by McDonald's in Singapore, most (98%) say they use their mobile device whenever they're with family and more than two-thirds of them admitted using smartphones during meals. Most parents also said their kids use their phone during family time.