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Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,
英语听力文摘 English Digest
SCIENCE IN THE NEWS -May 21, 2002: First electronically controlled animals / Study of mothers and their sons / Effects of global warming Broadcast: VOICE ONE: This is Sarah Long. VOICE TWO: And this i
科技之光
Don: Who's the smartest dog in the whole wide world? DOG BARKING Yael: Please. Even if Ralph is the smartest dog in the world, that's not saying much. Any animal that will do exactly what you tell it to do isn't very smart. I'm not saying dogs weren'
英语听力文摘 English Digest
LULU GARCIA-NAVARRO, HOST: In a little room at the University of Wisconsin-Madison, there's a scientific collection like no other, a room full of animal eyeballs. Want to see an eyeball from a duck-billed platypus - and who doesn't? Let's face it - o
2017年NPR美国国家公共电台7月
Canine Compulsive Disorder 狗也有强迫症？ Yal: Your dog Raphine sure to be seemed to be lick ing his legs excessive . Is he Ok? Don: Its nothing! Y: Im afraid not, Don. Raphine may have what animal behaviorists call canine compulsive disorder
英语听力文摘 English Digest
The Anatomy of Fear One nice day youre walking along a wooded path. You come around a corner and there, coiled in the path, is a huge rattlesnake , its rattles abuzz. You are deathly afraid of snakes. Various parts of the brain signal the nervous sys
英语听力文摘 English Digest