Ancient Clan War Explains Genetic Diversity Drop
Some 5,000 to 7,000 years ago, the diversity of Y chromosomes plummeted. A new analysis suggests clan warfare may have been the cause. Christopher Intagliata reports...
Stories by Christopher Intagliata
Mongooses Gift Grooming for Guard Duty
Humans and other primates often reciprocate good deeds...
Computers Go Head-to-Head with Humans on Face Recognition
The best facial-recognition algorithms are now as good as the best forensic examiners are. But the best results come by combining human and computer skills. Christopher Intagliata reports...
Computers Predict Pop Chart Success
An evolutionary analysis of pop tunes revealed that over the past 30 years songs have grown sadder—but the big hits buck that trend. Christopher Intagliata reports. ...
Stool-Pigeon Poop Reveals Bird-Racing Fouls
Racing pigeons is big business—and doping is common. Now scientists have devised a way to detect doping in the avian athletes. Christopher Intagliata reports...
Radar Scans Detail North Korean Nukes
Scientists have added radar info to seismic data, isotope measurements and optical imagery to study covert nuclear tests. Christopher Intagliata reports.
Jupiter and Venus Squeeze Earth's Orbit
Sediment records have confirmed that Jupiter and Venus change Earth's orbit from virtually circular to noticeably elliptical and back every 405,000 years. Christopher Intagliata reports...
Archaeologist Makes a Case for Seafaring Neandertals
Ancient tools on Mediterranean islands could predate the appearance of modern humans—suggesting Neandertals took to the seas. Christopher Intagliata reports...
Bad Audio Can Hurt a Scientist's Credibility
Listeners gave more credence to a scientist’s radio interview when the audio was good quality than they did to the same material when the audio was poor. Christopher Intagliata reports...
Drumming Beats Speech for Distant Communication
The Bora people in the northwestern Amazon use drums to send languagelike messages across long distances. Christopher Intagliata reports.
If Singing's Tough, Try Whistling
A new study claims it's easier to accurately whistle a melody than to sing it. Christopher Intagliata reports. ...
NYC Mice Are Packed with Pathogens
Mice trapped in New York City apartment buildings harbored disease-causing bacteria and antibiotic resistance genes. Christopher Intagliata reports...
Some Habitable Zone Exoplanets May Get X-Rayed Out
Red dwarfs are a popular place to hunt for small exoplanets in the habitable zone—but the stars' radiation bursts might fry chances for life as we know it. Christopher Intagliata reports...
Brain Scan Might Reveal Appetite for Risk
Volunteers willing to place riskier bets tended to sport larger amygdalas—a region associated with processing fear. Christopher Intagliata reports.
13,000-Year-Old Footprints under West Coast Beach
Several feet below a beach in British Columbia, archaeologists discovered soil trampled by human feet—the oldest footprints found so far in North America. Christopher Intagliata reports...
Math Cracks a Knuckle-Cracking Mystery
The source of knuckle cracking sounds is much debated—but new mathematical models may reconcile two opposing views. Christopher Intagliata reports.
Rotting Flesh Offers Insight on Fossilization
To learn more about decay and fossilization, researchers conduct unorthodox experiments—like dissecting decomposing animals in the lab. Christopher Intagliata reports.
Arctic Heat Waves Linked to Snowpocalypse-Like Storms
An analysis of more than six decades of daily temperature and snowfall data linked warmer arctic temperatures to cold snaps at lower latitudes. Christopher Intagliata reports...
Gut Parasites Have Their Own Gut Microbiomes
The whipworm lives in the human gut, mooching microbes from its host to build its own microbiome. Christopher Intagliata reports.
Saliva Protein Might Inhibit Intestinal Anarchy
A protein found in spit prevents bad bugs from binding to intestinal cells in the lab, pointing to a possible way to lower the chances of dysentery. Christopher Intagliata reports.
