Stumbled upon this weird, bumpy green ball under the trees. It looks like a brain and is sticky to touch. What is it?

1. Meet the Osage Orange: The ‘Brainy’ Green Fruit

The Osage orange, scientifically known as Maclura pomifera, is a unique fruit native to North America. Its most striking feature is its deeply wrinkled, bumpy surface that resembles the convolutions of a human brain. These fruits can grow to impressive sizes, typically measuring between 8 to 15 centimeters in diameter and weighing up to 1 kilogram.