christopher

发表于 2017-01-19 chemists atoms 192

Chemists have synthesized the most complex molecular knot ever, using a strand just 192 atoms long. The advance could lead to new tougher materials. Christopher…

LSD's Long, Strange Trip Explained

发表于 2017-01-27 lsd binds strange

When LSD binds to serotonin receptors, it pulls a "lid" closed behind it, locking it in place for hours, and explaining its long-lasting effects. Christopher In…

Gulf Dead Zone Makes for Shrimpier Shrimp

发表于 2017-02-09 shrimpier shrimp adchoices

The low-oxygen waters of the dead zone in the Gulf of Mexico result in smaller shrimp, and a spike in large shrimp prices. Christopher Intagliata reports. Learn…

Heat Sensor Has Snaky Sensitivity

发表于 2017-02-16 snaky sensitivity adchoices

Researchers have developed a heat sensor that can detect temperature changes of just ten thousandths of a degree Celsius—comparable with the sensitivity of pit …

Neandertals Live On in Our Genomes

发表于 2017-03-01 genomes neandertals adchoices

Researchers found that Neandertal gene variants still affect the way genes are turned off and on in modern humans. Christopher Intagliata reports. Learn more ab…

Last Woollies Had Mammoth Mutations

发表于 2017-03-03 coats woollies mutations

The final holdout woolly mammoths had large numbers of harmful mutations—which would have given them satiny coats and a weakened sense of smell. Christopher Int…

Teeth Hint at a Friendlier Neandertal

发表于 2017-03-09 neandertal friendlier teeth

By sequencing DNA in Neandertal dental plaque, scientists were able to find out about their diets—and their good relations with modern humans. Christopher Intag…

Pollinators Shape Plants to Their Preference

发表于 2017-03-17 bumblebee preference pollinators

In fewer than a dozen generations bumblebee-pollinated plants were coaxed to develop traits that made them even more pleasing to the bees. Christopher Intagliat…

Healthy Behavior Can Spread Like Illness

发表于 2017-04-21 spread healthy adchoices

If people run more in New York City, that can push their socially connected counterparts in San Diego to run more as well. Christopher Intagliata reports. Learn…

Ancient Human DNA Found in Cave Dirt

发表于 2017-04-29 cave dna adchoices

Scientists uncovered genetic traces of Neandertals and Denisovans by screening cave dirt for DNA. Christopher Intagliata reports. Learn more about your ad choic…