Monday links

Happy Birthday, Sir Arthur Conan Doyle, creator of Sherlock Holmes.

DIY: How to build a medieval crossbow.

When TV Logos Were Physical Objects.

The History of Tea.

When Women Started Growing Out and Painting Their Nails. 

Physicist Richard Feynman told the FBI to leave him alone. They did.

ICYMI, Friday's links are here, and include what to do if you get caught in an avalanche, the Justice Department’s guide to using psychics in police investigations, the physics of a T-Rex bite, and the Victorian belief that a train ride could instantly make you insane.