A busy protein known for its role in aging may also have a hand in depression, a study on mice hints. Under certain circumstances, the aging-related SIRT1 protein seems to make mice despondent, scientists report August 10 in the Journal of Neuroscience. The results are preliminary, but they might ultimately help find new depression treatments. […]
It’s all relativeIn “Earth is young at heart” (SN: 6/25/16, p. 5), Emily Conover reported that Earth’s core is more than two years younger than the planet’s surface, according to new calculations. Thanks to the effect of gravity on the passage of time, a clock placed at Earth’s core will tick fractions of a second […]
It’s time to go wild studying antimicrobial resistance, a research team says. Most analyses of how microbes come to laugh off the drugs and disinfectants that should kill them have focused on people in hospitals or livestock on farms, says behavioral ecologist Kathryn Arnold of the University of York in England. Yet a growing number […]
Out-of-reach nutrients could help explain why life on Earth took so long to bounce back from the worst extinction of all time. Analyzing the chemical changes that followed the Permian extinction 252 million years ago, geologists propose that hot sea surface temperatures led to conditions that trapped nitrogen far below the ocean’s sunlit, life-filled layers. […]
Bagpipe lungBAGpīp ləng n.An inflammatory lung disease caused by regular inhalation of fungi living inside bagpipes. In 2014, a 61-year-old man died after seven years of a mysterious illness that left him breathless, with a dry cough. Doctors diagnosed him with hypersensitivity pneumonitis, a rare disease caused by breathing in particles that irritate lung tissues. […]
If you have an appetite for cosmic destruction, there’s an app for that. NOVA Black Holes, a free iPad game developed by the PBS series NOVA, lets you hurl a star at other celestial objects while navigating an increasingly complex minefield of stars, planets and black holes. Each level presents a new target and a […]
Call it exoplanet fatigue. The historic detection of an exoplanet just 4.2 light-years from Earth, featured on our cover, was big news. It attracted a lot of media buzz. But outside the office, I heard little about it. No questions from other parents at the playground, including those who had been eager to chat about […]
An experiment with fake frogs shows how certain bats adjust their hunting technique to compensate for unnatural noises. Humankind is loud, and research already suggests that birds alter their singing in urban noise. Now tests show that bats listening for the frogs they hunt switch from mostly quiet eavesdropping to pinging echolocating when artificial sounds […]
Carefully counting steps, stairs and sprints might backfire for some people. At the end of a two-year weight-loss trial, people who used activity monitors had lost less weight than people without the device. The results, described in the Sept. 20 JAMA, are the exact opposite of what researchers expected to find. Going into the study, […]
A Swedish scientist is gene editing healthy human embryos, and he is probably not alone, researchers say. Chinese researchers have twice reported editing genes in human embryos that are unable to develop into a baby (SN Online: 4/6/16; SN Online: 4/23/15). But developmental biologist Fredrik Lanner of the Karolinska Institute in Stockholm is the first […]