Dutch doctoral student Auke-Florian Hiemstra excavated a bird nest, and made a startling discovery. From McDonald's lids to face masks, the nest was built with layers of human trash — the oldest ...

Essentially, that means that a bird will dump its eggs into the nest of another bird — relying on them to care for its young. And it's more common than you might think.

An osprey sits in its nest atop New York’s Bear Mountain Bridge in May 2024. CREDIT: New York State Bridge Authority. Ospreys are masters at swooping down into bodies of water to catch fish.