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.
An asteroid impact and volcanoes acting together could have done in the beasts, new rock dates indicate
A new genetic study of Latin Americans provides evidence that gene variants for lighter skin color came about in Asia as well as in Europe. Christopher Intagliata reports.
The fossilized print, found in Gibraltar, is said to date to 28,000 years ago, which might mean it belonged to a Neandertal. But not everyone agrees with that interpretation
When our planet’s magnetosphere nearly disappeared 565 million years ago, it may have almost taken all life with it
On this 210th anniversary of Darwin's birth we hear evolution writer and historian Richard Milner perform a brief monologue as Charles Darwin, and former Scientific American editor in chief John Rennie and Darwin's great-great-grandson Matthew Chapman read excerpts from The Origin of Species ...
As anthropologists debate how best to protect uncontacted tribes, indigenous groups in Colombia are working to shield their isolated neighbors from the march of modernity
Javelin throwers chucking replicas of Neandertal spears were able to hit targets farther away, and with greater force than previously thought to be possible. Christopher Intagliata reports...
Researchers have deduced which early human species occupied Denisova Cave and when, drawing surprising conclusions about who made the sophisticated artifacts found there
A species of hermit crab appears to have evolved a large penis to enable intercourse without leaving, and thus possibly losing, its adopted shell.
Modeling shows the 290-million-year-old Orobates had an advanced way of walking—revising an enduring view of how tetrapods colonized dry land
Ants infected with fungal pathogens steer clear of other cliques within the colony—avoiding wider infection, and allowing for a sort of immunity. Lucy Huang reports.
Climate change is shifting population numbers and nest building by resident and migratory birds in Europe—sometimes leading to deadly conflict. Christopher Intagliata reports.