Microwave doors have a metal mesh window to prevent the harmful microwaves from escaping. The holes are big enough to see inside but small enough to contain the microwaves. – WTF Fun Facts
Source: https://learning.knoji.com/why-microwave-ovens-can-have-see-through-windows/
Benjamin Franklin created a pulley system so he could lock and unlock his bedroom door from his bed. – WTF Fun Facts
Source: https://granburytheatrecompany.org/top-10-of-ben-franklins-lesser-known-feats-of-awesomeness/
Bear in Idaho tries to get into a house through the cat door – WTF fun facts
Event boundary, why we forget when we enter a room – WTF fun facts
