-
科学美国人60秒 SSS Ancient Mexican Metropolis Engaged in Hare-Raising Activity
As humans developed civilizations in Eurasia and Northern Africa, they also domesticated animals for food and labor: horses, cows, goats, pigs, sheep and a few others. But no evidence existed for the deliberate cultivation and breeding of animals in
-
科学美国人60秒 SSS Voters Are Seldom Swayed by Local Campaign Stops
Donald Trump hasn't been running the most traditional campaign. And it's not just the unfiltered tweets. He's neglecting campaigning full stop. Thomas Wood, an assistant professor of political science at Ohio State. He's had about half as many public
-
科学美国人60秒 SSS Humans Are Superpredators in the Landscape of Fear
Small carnivoreslike foxes or raccoons or badgersare themselves prey for larger predatorslike wolves. So they spend time hiding instead of hunting. This influence that big predators have on their ecosystem is called a landscape of fear. But humans ar
-
科学美国人60秒 SSS A Green Solution to Improve Indoor Air Quality
Air pollution outside is easy to spot, hanging over the city, or sputtering from a tailpipe. But there's lot of indoor air pollution, too, even if it's not as obvious. It's caused by volatile organic compounds, or VOCs. They can come from building ma
-
科学美国人60秒 SSS Waste Amphetamines Alter Underwater Ecosystems
Last week, tens of thousands of gallons of sewage gushed into urban streams in Baltimore, because of leaky pipes and flooding rains. And when that happens, it's not just organic matter and microbes that get flushed into aquatic habitats. It's drug re
