In the ’90s cartoon “Pinky and the Brain,” the titular Brain — a scheming lab mouse with an outsize noggin — fantasized about taking over the world. A study published Thursday in Science posits that ...

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Researchers (left to right) Gordon Shepherd, Anderson Feijó, Lauren Johnson, and Rafaela Missagia, working in the Field Museum’s mammal collections. Picture a squirrel eating an acorn. It’s holding ...

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In the natural world -- where predators pounce, prey flee, and group members feed and sleep in solidarity -- animal behavior is glorious in its variety. Now, new research suggests there may be an ...

Raccoons are medium-sized mammals that are native to North America and Mexico. These critters have also been introduced to Europe and Japan. They are easily distinguished by their bushy tail and ...

The shift from lizard-like sprawl to upright walking in mammals wasn’t a smooth climb up the evolutionary ladder. Instead, it was a messy saga full of unexpected detours. Using new bone-mapping tech, ...