Whats five times as strong as steel, twice as tough as Kevlar, and can be stretched over thirty percent in length without breaking? The answer is spider silk. 什么东西的强度是钢的5倍?什么东西的韧性是凯夫拉的2倍?什么东西能...
Researchers at Penn State University and the University of Buffalo have completed the most in depth bear DNA study to date. The project has revealed a lot about genetic relationships between bears, and also the unlikely romances that pepper their his...
The next time youre driving during a rain shower, glance back at the rear window. Youll notice that while raindrops batter the front windshield, they seem to avoid the back window as long as the car is moving. How is that possible? 下一次下阵雨而...
Todays Moment of Science digs up the story behind one of the grizzly bears more unusual nicknames: the Rototiller of the Rockies. 今天科学一刻将会深入挖掘灰熊的一个不同寻常的绰号背后的故事,这个绰号就是落基山脉的...
On airplanes, cabin pressure changes during takeoff and landing to help passengers breathe easy at high altitudes. These changes in air pressure may make adults ears feel a little funny, prompting a few yawns to equalize the pressure. But for babies,...
Fish do drink water, but how they consume it depends on where they live. Water gets into a fishs body through osmosis, the process in which water diffuses from a higher to a lower concentration. 鱼儿确实喝水,但它们怎样喝水却取决于其...
During the last ice age, rapid swings in temperature occurred within decades or less, meaning populations of organisms had to adjust quickly to new environments or face extinction. 在最后一个冰河世纪中,温度在数十年甚至更短的时间...
Todays program is about an effect that not only have we all witnessed, but have participated in. Havent we all been on an elevator and noticed that just about everyone stops talking when they get on? Why do we do that? You can be having a perfectly p...
Few minor injuries are as painful as the dreaded paper cut. Just thinking about it probably makes you cringe. However, these cuts are usually small, hardly noticeable, and rarely bleed. So what makes them so painful? 很少有一些小伤能够像被纸...
You may have heard that humans and chimpanzees have something like 96 percent of our DNA in common. So why, then, are diseases like cancer so common in humans but so rare in chimps? If our DNA is nearly identical, shouldnt we be at risk for many of t...