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  • In World First, Monkeys Cloned Like Dolly the Sheep
    Since then, scientists have cloned more than 20 species—from cows to rabbits to dogs—using this technique, but the Chinese effort marks the first time that non-human primates have been cloned
  • What is mass extinction and are we facing a sixth one?
    About 98% of all the organisms that have ever existed on our planet are now extinct When a species goes extinct, its role in the ecosystem is usually filled by new species, or other existing ones Earth's 'normal' extinction rate is often thought to be somewhere between 0 1 and 1 species per 10,000 species per 100 years
  • Black Rhino | Species | WWF - World Wildlife Fund
    Between 1960 and 1995, black rhino numbers dropped by a sobering 98%, to less than 2,500 individuals Since then, the species has made a tremendous comeback from the brink of extinction Thanks to persistent conservation efforts across Africa, black rhino numbers have doubled from their historic low 20 years ago to more than 6,000 today
  • How mammals took over the world - Science News
    The Rise and Reign of the Mammals Steve Brusatte Mariner Books, $29 99 In my opinion, the most satisfying science documentary TV series ever made was a 1970s British production called Connections
  • Reintroducing large mammals could restore the worlds . . .
    For example, one of the 20 species predicted to have the most impact if reintroduced is the dama gazelle But these animals, native to the Sahara, are themselves Critically Endangered with only 200 adults left in the world The scientists, however, acknowledge that many changes are needed before reintroductions could begin
  • Khan Academy
    If you're seeing this message, it means we're having trouble loading external resources on our website If you're behind a web filter, please make sure that the domains * kastatic org and * kasandbox org are unblocked
  • This mammal has the world’s slowest metabolism
    More than one-third of Earth’s land is forested That means there is lots of treetop space for these critters Yet few vertebrate species choose to subsist on tree leaves In contrast, other types of animals have heavily diversified throughout habitats that take up much less space globally For instance, there are 15 species of finch on just





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