A TED-Ed lesson by Carly Anne York, PhD explains how the female African clawed frog was once used to detect pregnancy in humans.

A very playful golden retriever named Finn repeatedly drops his toys, particularly balls, into his human Lucy's tub as she's taking a bath.

The Nerdwriter looks at the 1537 portrait of Henry VIII, noting how large the King's codpiece was drawn despite his questionable virility.

Derek Cooper introduced the Moog synthesizer during a 1969 episode of the BBC science show "Tomorrow’s World".

A news clip from 1993 captures the varied reactions of Burger King customers being told that restaurant would be accepting credit cards.

The United States Postal Service released a beautiful commemorative "Forever" stamp that pays tribute to the late Justice Ruth Bader Ginsburg.

Mallory Crusta of Cats.com shared colorful facts about calico cats, noting their unique tricolor coat and why they are almost always female.

Brandon Birchak stood inside a tank of water and held his breath for 17 minutes while Derek Muller explained extreme breath holding.

A wobbly black cat named Willy Wonky, who lives a wonderful life with his humans in Kansas City, adopted a wobbly kitten to join the family.

Dutch artist Theo Jansen built "Animaris Rex" a connected unit that walks in step with the Strandbeest while following behind.