The creator of Gravity Falls - Alex Hirsch - voiced 27 different characters on the show.

After WWII, scientists began testing the effects of radiation on plants. The research eventually turned towards introducing beneficial mutations to the plants, like faster growth rate. This was part of Atoms for Peace, a program to develop peaceful uses of fission energy. More than two thousand plant varieties were created, many of which are used in agricultural production today.

There’s a place in Yellowstone National Park where it’s possible to legally get away with murder. About 50 square miles of the park is in Idaho, while the majority of it is in Wyoming. The Sixth Amendment means you have the right to a jury made of people from the state and the federal district where the murder was committed. But the District of Wyoming has purview over all of Yellowstone, and nobody lives in the Idaho part of Yellowstone, so no jury could be formed.

11-35% of the population is affected by photic sneeze reflex, sometimes humorously called ACHOO syndrome, which is characterized by sneezing in response to bright light and other stimuli.

The voice actor of SpongeBob (Tom Kenny) and the voice actor of Karen (Jill Talley), Plankton’s computer wife, have been married since 1995.

Hooded seals have the shortest nursing period of any mammal, at about 4 days. This is because the female’s milk is 60-70% fat.

The Beatles’ song ‘Hey Jude’ was originally titled “Hey Jules” for Julian Lennon as Paul McCartney wrote it to comfort him from the stress of his parents' separation.

The Pokémon Hitmonchan is named after Bruce Lee. Its Japanese name, Ebiwalar, comes from the world champion boxer Hiroyuki Ebihara.