Evolution

Scientists tracked bumblebee queens with radar when they emerged from hibernation and found the bees take only brief flights en route to a new nest. Christopher Intagliata reports.

A huge T. rex was crowned as king of the tyrants. But the bones may tell a different tale

A fossil snout connects flying reptiles from the Iberian Peninsula and China

Contrary to a popular hypothesis, pro-social religions didn’t kick-start complex social systems

Whatever made these structures lived 1.4 billion years before the first animals

Researchers aiming to lower the cost of mealworms were able to double the worms' size, but the larger larvae had fewer eggs and weaker offspring. Christopher Intagliata reports.

Eating porridge and cheese appears to have changed our bite to enable the vocal tract to produce new sounds

Counter to expectations, an apparent drop in dinosaur diversity at the end of the Cretaceous indicates there are many species yet to be found

A bitten bone shows how a young tyrannosaur fed

Thyroid hormone, which helps warm-blooded animals regulate body temperature, also appears to put a halt on heart regeneration. Christopher Intagliata reports.

Excavations of stone tools left behind by nonhuman primates are illuminating the origins of technological innovation

Psychiatrist Randolph Nesse, one of the founders of evolutionary medicine, explains why natural selection did not rid our species of onerous psychiatric disorders