"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: Single-celled organisms aren’t often associated with ...

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly genetically identical cells. Depending on the organism, these cells arrange ...

A recent study has found that a specific single-celled organism has the capacity for Pavlovian associative learning without a brain or even a neuron.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: When biologists refer to ‘complex life,’ they almost ...