Early human species may have had sharper hearing in certain frequencies than we enjoy, to facilitate short-range communication in an open environment. Cynthia Graber reports
Scientists are racing to solve the enduring mystery of how a large, dangerous carnivore evolved into a playful companion
Living on a small planet in a big universe exposes us to all manner of existential problems, but what are the worst, and what are the weirdest?
The identity of Earth's first flower has long vexed botanists. A new interpretation of an old fossil adds to the evidence that they may have come from the water.
The brown thornbill scares away its attacker by pretending an even bigger bird is nearby
Healthy ants wanted nothing to do with free-radical-rich foodstuff, but ants exposed to a pathogenic fungus sought it out, which upped their odds of survival. Christopher Intagliata reports...
Pyrenees fossils suggest the Montsechia lived up to 130 million years ago and is the earliest known example of a fully submerged aquatic flowering plant
The largest invertebrate genetic code unleashes clues to camouflage, suckers, evolution
A single-point mutation in corn's ancestor teosinte got rid of the hard shell that used to encase every kernel
A new technique for finding and characterizing microbes has boosted the number of known bacteria by almost 50 percent, revealing a hidden world all around us.
One sexually transmitted virus seems to cut HIV death rates
A new effort to bring global cohesion to origins of life science launches, and with it a fresh look at how to crack one of the greatest existential questions.
Microbes 2,500 meters below the seafloor in Japan are most closely related to bacterial groups that thrive in forest soils on land, suggesting that they might be descendants of ones that survived when their terrestrial habitat was flooded 20 million years ago ...
To a tiny worm called a nematode, slugs may be the ultimate sexy ride: moist, secure, and maybe even pre-loaded with snacks.
Fish evolution is tied to key moments in human history
Animal communication studies have shown only fixed vocalizations, such as alarm cries. But Bonobo chimps appear to have a call that has different meanings in different contexts ...
Adults of the west African Baka people and east African Efé and Sua peoples average less than five feet tall. But while the Efé and Sua are born small, the Baka have slow growth rates in infancy ...
Certain vaccines prevent sickness and death, but don't block transmission—meaning they may actually give some viral strains an extra shot at survival. Christopher Intagliata reports...
An analysis of the acoustical characteristics of screams found that the sounds are unusually rough, that is, they rapidly change in frequency, which has an alarming effect on the listener's brain ...
Glacial archaeologists scramble to save long-preserved specimens thawing out of vanishing ice before they are lost forever