Knee Sounds Give Docs a Leg Up
A wearable device records the sounds of knees cracking, which could reveal clues about the condition of the joint. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices

A wearable device records the sounds of knees cracking, which could reveal clues about the condition of the joint. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
In an analysis of 14 presidential debate transcripts, two thirds of accusations of question-dodging had no merit. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Remnants of a beer-making operation some 5,000 years old have been found in northern China. Learn more about your ad choices. Visit megaphone.fm/adchoices
Evidence indicates that waves as tall as skyscrapers and thousands of kilometers wide once washed over the Red Planet. Learn more about your ad choices. Visit megaphone.fm/adchoices
Many red-colored birds have to convert yellow pigments in their food into the red pigments that make their feathers and beaks so brilliant. Learn more about your ad choices. Visit megaphone.fm/adchoices
Two different antibiotic-resistant E. coli strains have a protective relationship in which each disables a different antibiotic, allowing both to thrive. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Scientists from numerous disciplines will brainstorm new strategies for measuring "Big G" in July. Learn more about your ad choices. Visit megaphone.fm/adchoices
Dust clouds from the Sahara reach the Caribbean—and fertilize waters there when they arrive. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
A single-celled organism discovered in chinchilla droppings is the only known eukaryotic organism that lacks mitochondria-like organelles. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Caltech theoretical physicist Sean M. Carroll talks about the necessary connections among the various ways we have of describing the universe. Learn more about your ad choices. Visit megaphone.fm/adchoices
Raindrops eject carbon-based blobs of soil material from wet fields, creating a mist of organic compounds above the soil. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Hydrofoiling boats competing in the America's Cup World Series came to New York City to show off the cutting edge of sailing technology. Learn more about your ad choices. Visit megaphone.fm/adchoices
A chemical compound can cut a cow's methane emissions by 30 percent—and help the animal get more energy from its food. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Lemurs sometimes mix their smelly secretions to produce a bouquet of stank—which may boost the perfume’s staying power. Karen Hopkin reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
A study links single living to a thinner waistline and lower BMI, compared with co-habitating couples. Erika Beras reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Researchers found that neighborhoods with a higher proportion of Flickr photos tagged "art" saw a higher spike in property prices. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
An individual's unique brain response to images of a celebrity and a food could be used to create an ID procedure at high-security sites. Learn more about your ad choices. Visit megaphone.fm/adchoices
Volunteers who ate veggies grown in wastewater had higher (but still safe) levels of an epilepsy drug in their urine, compared with subjects who ate freshwater-grown veggies. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
When a species of nightshade is injured by hungry beetles, it produces sugary nectar at the wound site. The nectar attracts ants that then keep the beetles at bay. Learn more about your ad choices. Visit megaphone.fm/adchoices
Mountain-climbing bears transport cherry tree seeds, internally at first, to cooler, higher altitudes where the trees can survive as temperatures rise. Learn more about your ad choices. Visit megaphone.fm/adchoices
Study volunteers whose voices deepened during a group debate tended to be more influential and convincing. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
The vocalizations of the gelada, a baboon relative, appear to follow a linguistic rule called Menzerath's law. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Woodpeckers that listen to others of their kind drum into trees alter their behavior based on what they hear. Learn more about your ad choices. Visit megaphone.fm/adchoices
The development of statistics, probability theory, game theory and chaos theory owes a lot to people trying to figure out various games of chance. Learn more about your ad choices. Visit megaphone.fm/adchoices
Millions of tiny graphene robots can propel themselves through wastewater and scavenge heavy metals. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Rockfalls without an obvious cause (like an earthquake or expanding ice) may be due to hot daily air temperatures expanding small cracks in cliff faces. Learn more about your ad choices. Visit megaphone.fm/adchoices
Researchers have uncovered the chemistry that makes the urine of bearcats smell like freshly cooked popcorn. Learn more about your ad choices. Visit megaphone.fm/adchoices
Pancreatic type beta cells produced from stem cells can sense glucose, release insulin and treat a mouse model of diabetes. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices
Mundane notes about daily life on 16 ceramic shards written about 600 B.C. at an ancient military fortress in the Negev Desert reveal that literacy had to be common. Learn more about your ad choices. Visit megaphone.fm/adchoices
The Brazilian torrent frog has the most sophisticated visual communications system yet documented for a frog species. Learn more about your ad choices. Visit megaphone.fm/adchoices