标签:extinction 相关文章
By Kent Klein Washington 31 May 2008 U.S. President George Bush says the Democratic-led Congress has failed to address a series of important issues, and he wants action soon. Democrats are pushing their Republican colleagues in Congress to support en
With the weight of between three and five tons, the white rhinoceros checks in as the planet's second largest land mammal. AZUZ: And the sub species of the white rhino known as the northern white rhino is now just two animals away from complete extin
Lesson 13 Thames Waters 泰晤士河水域 Oxford has been ruined by the motor industry. The peace which Oxford once knew, and which a great university city should always have, has been swept ruthlessly away; and no benefactions and research endowmen
African Penguins Pulled into an Ecological Trap生态陷阱迷惑了可爱的企鹅 Over millions of years, penguins have evolved a keen sense of where to find food. Once theyre old enough, they set off from the shores on which they hatched for the f
Unit 54 Slow Food Movement The International Slow Food Movement was founded in 1986 by leftist journalist Carlo Petrini in a determined effort to wage intellectual war on the homogenization of food around the world. Spurred by the opening of Italy's
Scientists at the Whitehead Institute in Cambridge, Massachusetts say it's fortunate for humans that the Y chromosome is not on the verge of extinction. That's because the Y is the chromosome that makes males males. The outlook is less favorable for
By Craig Fitzpatrick Washington, DC 28 July 2006 watch Saving the Tigers report Tigers have long been a symbol of grace, power and majesty. Because of this their body parts are highly prized in Asian countries. A new study by environmentalists says
Experts say one-third of the oceans' coral reefs face extinction by the middle of the century if nothing is done to save them. The reefs are home to a vast array of sea creatures, which experts say would also be endangered by the loss of the reefs.
By Zulima Palacio Kauai, Hawaii 18 June 2007 The Hawaiian archipelago represents the most isolated group of islands in the world. Plants and animals that are common to many people elsewhere only made it to these islands in the last few hundred years
By Carol Pearson Washington, D.C. 26 June 2007 Smallpox was the first infectious disease ever to be eradicated worldwide. But now, thanks to a two-decade campaign, guinea worm disease is about to be eradicated as well. Unlike smallpox, guinea worm di
In a new report on Iraq, the U.S. Commission on International Religious Freedom says religious minorities in Iraq face persecution. The commission, which recommends that the U.S. government designate Iraq a country of particular concern because of r
Animal-Related Diseases Concern Scientists Health researchers and wildlife biologists say the number of infectious diseases that have jumped the boundary from animals to humans and between animal species is on the rise. Scientists believe the increas
By Zulima Palacio Carroll County, Maryland 22 September 2009 The bog turtle In Maryland, environmental officials are working to save one of the smallest and rarest turtles in North America. The bog turtle had the power to move an entire highway proj
US, World Act to Save Elephants 美国,世界采取行动拯救大象 WASHINGTON The Obama administration has unveiled a comprehensive strategy for combating wildlife trafficking in hopes of curbing illicit poaching that is threatening to wipe out el
To find the answers, we need to rewind history around 14,000 years to a time when the first people set foot in North America. The continent was about to undergo a profound change, a change these new arrivals may have played a part in. Throughout the
The same signs appear in young male mammoth tusks, but those living in North America at the end of Ice Age laid down their stress rings three years earlier than usual. In other words, it seems that young males were leaving the herd at an earlier age.
By Trish Anderton Bali 05 December 2007 At the U.N. conference on Global Climate Change in Bali, the early talk has focused on whether some of the major developed countries will commit to cutting greenhouse gas emissions in the coming years. European
By David McAlary Washington 10 May 2006 There is new evidence in the case of the missing woolly mammoth. In fact, several species of large mammals in addition to the mammoth went missing at the end of
Hi there, I'm Ore with the BBC World News for Children. Coming up: Japan's mission to super hot planet. A new survey says kids care more about computers than animals. And Inter Milan face Bayern Munich in the Champion's League final. First up, after
Coextinction 绝种是指生物群体逐渐消失的过程。物种和较大族群常态性的灭绝,并由更进步的形式所取代,这是进化的正常过程。然而,从化石的记录来看,有时会出现整个科目的动物和植物都