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...
Canada: "The question of how many species exist has intrigued scientists for centuries and the answer, coupled with research by others into species' distribution and abundance, is particularly important now because a host of human activities and influences are accelerating the rate of extinctions...
Canada: "The question of how many species exist has intrigued scientists for centuries and the answer, coupled with research by others into species' distribution and abundance, is particularly important now because a host of human activities and influences are accelerating the rate of extinctions...
Humans share Earth with many different kinds of wildlife. However, many of our animal friends may not be around for much longer. According to the Living Planet Report released by the World Wildlife Fund (WWF) in October, populations of several animals, including mammals (哺乳动物), birds and...
Renewed interest in further exploration and taxonomy is required if this significant gap in our knowledge of life on Earth is to be closed. Citation: Mora C, Tittensor DP, Adl S, Simpson AGB, Worm B (2011) How Many Species Are There on Earth and in the Ocean? PLoS Biol 9(8): e...
With 75% of all species expected to disappear in the next 300 years, scientists believe that we’re experiencing the sixth mass extinction on Earth. And it’s the fastest one ever recorded. Many of the previous extinctions lasted hundreds of thousands and even millions of years. But this one...
how to protect animalthere are many kinds of animals in the world,but not only the humans.we live in the same world,and we should be friends.as everybody knows, the humans are the rulers of the world today,so we should protect our friends--the animals!but how to protect them? as fi...
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 ...
Biodiversity(生物多样性), or biological diversity, is a wide-ranging concept that covers all the different kinds of plant and animal species present on earth. Environmentalists believe that many millions of species exist. As all these living organisms are dependent on each ot...
Many wild animals are in danger because the environment that they are living in has changed a lot. With the development of cities, the air is polluted and the water is not clean any more. Wild animal’s living places are polluted badly. At the same time, many people kill them for their...