VOICE ONE: I'm Steve Ember. VOICE TWO: Charles Darwin And I'm Barbara Klein with EXPLORATIONS in VOA Special English. This month is the two hundredth anniversary of the birth of one of the most influential thinkers in science history. Charles Darwin

发表于:2018-12-07 / 阅读(147) / 评论(0) 分类 VOA慢速英语2009年(二)月

SCIENCE IN THE NEWS - Scientists Search for New Ways to Treat Infection This is SCIENCE IN THE NEWS, in VOA Special English. Im Christopher Cruise. And Im Jim Tedder. Today, we report on the search for new ways to treat infections. We tell how resear

发表于:2018-12-16 / 阅读(231) / 评论(0) 分类 2012年VOA慢速英语(十)月

Perhaps youve seen the famous TED talk about so-called power poses. It encouraged viewers to change the course of their lives by assuming what are thought of as dominant postures. So you make yourself big, you stretch out, you take up space. You're b

发表于:2018-12-24 / 阅读(68) / 评论(0) 分类 2016年Scientific American(十二)月

When you think about dog food, you probably picture more meet than potato. But a new study finds that unlike wolves, dog have genes allow them to digest starch. That evolutionary adaptation may help fuel domestication. The report is in the journal na

发表于:2018-12-24 / 阅读(66) / 评论(0) 分类 Scientific American(一)月

Ladybugs love to snack and feast on other pests, so people began importing in Asian species called hollyqueen ladybugs as natural pest control. But in their new environments the hollyqueens wiped out native ladybugs and they have their parasites to t

发表于:2018-12-24 / 阅读(78) / 评论(0) 分类 Scientific American(五)月

Lesson 89 Excavating for Answers 挖掘答案 Words: evaporate v. (使)蒸发,消失 evasion n. 逃避 evasive adj. 逃避的,推脱的 eventful adj. 发生许多事情的,充满大事的;重大的,重要的 eventual adj. 最终的 eventually adv. 终于 evergreen n. 常绿的;adj.常

发表于:2018-12-30 / 阅读(63) / 评论(0) 分类 胡敏托福词汇记单词

Can wearing sun glasses make you more vulnerable to sunburn? Are there people who can resist the AIDS virus better than others? Can a human body rust to death? In his new book Survival of the Sickest, a Medical Maverick discovers why we need disease.

发表于:2019-01-06 / 阅读(94) / 评论(0) 分类 访谈录

Explorations - Great Thinkers: Charles Darwin and Evolution STEVE EMBER: Welcome to Explorations, in VOA Special English. I'm Steve Ember. This week, Barbara Klein and I tell about one of the most influential thinkers in science history. Charles Darw

发表于:2019-01-12 / 阅读(93) / 评论(0) 分类 2011年VOA慢速英语(十一)月

Dinosaurs Already Decreasing Before Asteroid Hit 恐龙数量在小行星撞击地球前就已减少分享到: Dinosaursthose big prehistoric creatures may have already been decreasing in population long before an asteroid crashed into the Earth, and

发表于:2019-01-12 / 阅读(67) / 评论(0) 分类 2016年VOA慢速英语(五)月

Robert Keeling says he's never felt better in his life. He never gets sick. I don't have colds anymore, he says. The 35-year-old Washington lawyer attributes his good health to exercise and diet. He likes the high intensity group workout he gets at C

发表于:2019-01-13 / 阅读(85) / 评论(0) 分类 VOA标准英语2010年(二月)

New Malaria Drugs Stop Parasite Early U.S. medical researchers report a possible breakthrough that might prevent infection by one of the two most widespread varieties of malaria. A new class of anti-malaria compounds kills the parasites in the develo

发表于:2019-01-13 / 阅读(83) / 评论(0) 分类 VOA标准英语2011年(十一月)

Love is a Matter of the Brain While our thoughts and emotions seem like invisible, intangible things, these internal states can be inferred by monitoring blood flow in different parts of our brain using advanced imaging techniques. Neuroscientist Luc

发表于:2019-01-14 / 阅读(55) / 评论(0) 分类 VOA标准英语2012年(二月)

Smithsonian Artist Brings Faces from Past to Life The Hall of Human Origins at the Smithsonian's National Museum of Natural History in Washington is a magnet for tourists. Five life-size bronze dioramas weave a tale of everyday life stretching back m

发表于:2019-01-14 / 阅读(64) / 评论(0) 分类 VOA标准英语2014年(一月)

Which Came First: The Proboscis or the Flower? To learn about the plant life of long ago, scientists dig through layers of the Earth, looking for fossil clues. Like bits of fossilized pollen, or spores.And that's where I come in. Timo van Eldijk (EL-

发表于:2019-01-20 / 阅读(79) / 评论(0) 分类 2018年科学美国人1月

In the east African savanna, pools of water form during the rainy season only to dry up a few months later. Being a fish in one of these temporary ponds is a challenge. To survive, they race to maturity, with the shortest generation time of any verte

发表于:2019-01-20 / 阅读(65) / 评论(0) 分类 Scientific American(九)月

If the sight of Swiss cheese makes you melt or the thought of a honeycomb gets you buzzing, you may suffer from trypophobia, the most common phobia that you've probably never heard of. Trypophobia is the fear of holes. People with the phobia experien

发表于:2019-01-20 / 阅读(69) / 评论(0) 分类 2014年Scientific American(二)月

Selective Breeding Molds Foxes into Pets狐狸变成狗 Want to make a dog? Well, wolves evolved into dogs at least once. But it turns out you can also make whats basically a dog by starting with wild foxes. Select the ones that do not seem to want t

发表于:2019-01-20 / 阅读(48) / 评论(0) 分类 2017年科学美国人(五)月

Why the Cross Put Chickens on a New Road探秘家禽的驯化之路 Why did the chicken cross the road? Well, thats a philosophical pickle. But if you want to know why chickens dont get cross at peoplewhy theyre content being kept in their coopsscien

发表于:2019-01-20 / 阅读(102) / 评论(0) 分类 2017年Scientific American(六)月

solid armor and dangerous weapons all deliver the power to stand up to huge predators. But in the world of Cretaceous, other defenders come equipped with tools not only to survive an attack but to defeat an opponent. Ankylosaurus is a herbivore desig

发表于:2019-01-23 / 阅读(111) / 评论(0) 分类 探索与发现2013年

[Cartoon audio clip] We interrupt your regular broadcast to bring you this important news bulletin. Humans can talk. Chimps cant. Your scientific jargon staggers me, Pinky. In recent years scientists have learned that mutations in a gene called FOXP

发表于:2019-01-30 / 阅读(107) / 评论(0) 分类 60秒科学