Though taxonomists have been cataloguing plants and animals for more than 250 years, they still have no exact answer to the question, “How many species are on Earth?”“It’s a very simple question, but we have no simple answer,” Fisher said. One of the reasons we can’t get an...
Just how many truly intelligent species are there living on Earth?While they may not be living "in a pineapple under the sea",a new study finds there's at least one species in the ocean that shows the intelligence of human children.Researchers at the Marine Biological Laboratory say cuttlefis...
Climate change may be an important threat to global biodiversity, potentially leading to the extinction of numerous species. But how many? There have been various attempts to answer this question, sometimes yielding strikingly different estimates. Here, we review these estimates, assess their ...
How did the Earth get so many species (物种)? For thousands of years, people wondered. In the 1840s,one naturalist had an idea. His name was Charles Darwin. He spent his whole life studying animals and insects (昆虫). Darwin thought that new species developed slowly, as populations of ...
This may not be a word-for-word transcript. Hey there, welcome to Life Noggin! More animal species have gone extinct in the last 500 years than in the last 20 million years combined. And incredible …
大家都知道动物是我们的朋友。所以我们应该对他们友好。但是一些人杀死珍稀动物,如大熊猫,金丝猴等为了得到钱。不久它就会导致这些动物消失。我认为我们的政府应该严惩这些人谁杀死珍稀动物。是我们的责任来保护濒危动物。Earth's biological diversity is being fast decline of many species facing extinction. Threat to...
Itsestimatedtheseforestscontainanythingfrom 50 to 90 percentofallanimalandplantspeciesonEarth. Inonestudyof a five-square-kilometerareaofrainforestinPeru, forinstance, scientistscounted 1, 300 speciesofbutterfliesand 600 speciesofbirds. IntheentirecontinentalUnitedStates, only 400 speciesofbutterfliesand ...
But many scientists don't see it that way at all. Instead of becoming obsolete, dinosaurs evolved into birds, which are extremely sophisticated. Not only did they become a type of animal that still exists today, they also developed a skill that very few life forms on Earth have. Only pter...
(在来 十年内,这种动物的数量将减少60%。 );D.T he animal population has dropped sharply in p ast decades.(在过去的几十年里,动物的数量急 剧下降。 ) ;根据第二段According to the Living Planet Report released by the World Wildlife Fund (WWF) in October, the populations of an imals ...
Older than dinosaurs and trees, sharks have endured a lot throughout their 450 million years on Earth. They’ve even survived five mass extinctions, including the asteroid that wiped out 75% of life on the planet. But many species of these aquatic apex p