Freshwater dolphins are evolutionary relics, and their calls give clues to the origins of cetacean communication in general. Christopher Intagliata reports.
The tiny brain of a honeybee is apparently able to calculate small numbers' addition and subtraction. Annie Sneed reports.
Female hyenas keep their clans in line by virtue of their complex social networks. Jason G. Goldman reports.
Coyotes become fearless around people in just a few generations—which isn’t good for their longterm co-existence with humans in cities. Jason G. Goldman reports.
The second tiny ancestor found in the islands of southeast Asia, Homo luzonensis challenges prevailing views of early human dispersal and adaptability
Several factors, from geography to group identity, helped this traditional body art endure—even as similar practices were lost in other cultures
The raptorlike prints could also have been from juveniles of a larger species
The monkeys lower the pitch of their "whinnies" when they're far from the rest of their group, which might help the calls travel further through jungle foliage. Christopher Intagliata reports...
Domestic felines distinguish between their monikers and similar-sounding words, new research shows
Characteristic etchings on ancient prey bones reveal the animal that digested them
A new theory challenges assumptions about when and how our ancestors altered their behaviors to boost brainpower
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.
Contrary to a popular hypothesis, pro-social religions didn’t kick-start complex social systems
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
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
Researchers say they found evidence life began moving 2.1 billion years ago, but that contentious conclusion is far from certain
Grandmothers can enhance the survival of grandchildren. That is, unless grandma’s too old or lives too far away. Karen Hopkin reports.