Paraskavedekatriaphobia: Why is Friday the 13th considered unlucky?
Twenty-two stunning examples of people painted to look like animals.
All the horrible ways animals can kill you with venom.
Tomorrow (June 14) is Flag Day and the birthday of the U.S. Army.
Gallery: The strange history of the sunflower.
The history of light, including how much light, historically, you could get for a day’s work:
Antiquity: 10 minutes (candle)
1800s: 5 hours (kerosene)
Today: 20,000 hours (electricity))
ICYMI, Wednesday’s links are here, and include vintage tech, turning paper airplanes into drones, richest superheros, and PSAs for dogs.