The self-taught artist Abraham Lincoln Walker worked in his basement on phantasmagorical paintings, discovered by the art world more than 30 years after his death.

Thousands of 12,500-year-old rock paintings dubbed the "Sistine Chapel of the ancients" have been found in the Amazon jungle.

Sonja Krawesky was searching through a box of old phone cases, fake mustaches and rip-off Oscar statues at an Ontario ...