科学美国人60秒 SSS Medical Marijuana Faces Fed's Catch-22

Medical marijuana is now available in 28 states. But a big obstacle to research on marijuana as medicine is that its listed by the federal government on whats called Schedule I. Assignment to Schedule I means that the Food and Drug Administration doe

科学美国人60秒 SSS Blood Cells Remember Your Mountain Vacation

Head to the mountains, and if the steep trails don't slow you down, the thin air will. There's less oxygen up thereso strenuous activity can leave you dizzy, out of breathor worse. But even though you're beat, biochemical processes are already busy a

科学美国人60秒 SSS Fermented Foods Find Fervent Advocate

There are sort of three main ways that our species has developed to break down foods, or process foods, in a primordial way. And that is by cooking, by fermenting foods and by drying them or desiccating them. Paul Breslin, professor of nutritional sc

科学美国人60秒 SSS Vision Needed to Curb Nearsightedness Epidemic

So were inside, were in fake lighting, were not spending as much time outside in the context in which our visual system evolved. Amanda Melin, assistant professor of anthropology archaeology and of medical genetics at the University of Calgary. And a

科学美国人60秒 SSS Guppy Groups Provide Friendly Protection against Foes

Humans aren't the only species that forms friendships. Lots of animals prefer to spend their time only with certain individuals. It's all very well showing that you do get social relationships and social bonds forming, but why on earth would you form

科学美国人60秒 SSS Spaceflight Squishes Spacefarers' Brains

Time spent in zero G changes the body: Astronauts come home with bone loss and muscle weakness. But what happens in their heads? To find out, researchers examined MRIs of astronauts brains taken before and after flight. They looked at 12 astronauts w

科学美国人60秒 SSS Two Words Trigger CDC To Stay Quiet

CDC is afraid is afraid to fund firearms research. David Hemenway, professor of health policy at the Harvard T.H. Chan School of Public Health. Twenty years ago they were doing a tiny amount of funding for firearms research, $2.6 million a year, $2.6

科学美国人60秒 SSS The True ＂Bottom＂ of the Food Chain Is Plenty Polluted

The Mariana Trench is the deepest spot in the worlds oceans. Only three humans have ventured into the trench in submersibles. But plenty of our pollution has made the voyage to the bottom of the sea: a new study finds that critters living more than s

科学美国人60秒 SSS Heat Sensor Has Snaky Sensitivity

One of the most exquisite heat sensors in the worldits not in some government lab. It's in the head of a snake. The pit viper, to be specific. They're incredibly sensitive. They beat any of the synthetic counterparts, even the most expensive semicond

科学美国人60秒 SSS Housing Boom Busts Birds' Valentine's Day

Urban development is encroaching on forests in the Pacific Northwest. And its also ruining Valentines Day for some songbirds. Because urban growth is making it a challenge for some birds like the Pacific Wren to stay faithful to their partners, at le

科学美国人60秒 SSS Pesticide Additive Could Be One Culprit in Bee Deaths

Pesticide Additive Could Be One Culprit in Bee Deaths 农药添加剂是蜜蜂死亡的一大诱因 Springtime is flower season. And that includes some 90 million almond trees in California. It's the largest pollination event in the U.S.and beekeeper

科学美国人60秒 SSS Stone Age Pottery Reveals Signs of Beekeeping

Stone Age Pottery Reveals Signs of Beekeeping陶器揭露人类养蜂历史 You have bees to thank every time you drizzle some honey into your tea. And the human-honeybee relationship is long-standing. Iconography of honeybees adorns 4400-year-old wa