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Tag: "sloths" at biology news

Oxygen increase caused mammals to triumph, researchers say

...ecome very, very large - mammals like 12-foot-tall sloths and huge saber-toothed cats. They paved the way for all subsequent large mammals, including ourselves." The results described in Falkowski's article, "The Rise of Oxygen Over the Past 205 Million Years and the Evolution of Large Placental Mammals," ...

Ancient DNA confirms single origin of Malagasy primates

...nd Megaladapis. The first has been likened to tree sloths and the second compared to koala bears. Both ranged in body weights from 100 to 150 pounds, as compared to the largest living lemur, Indri indri, which weighs in at fewer than 15 to 17 pounds. "The most important conclusion to be drawn from our stud...

Study shows big game hunters, not climate change, killed off sloths

... likely culprits in the extinction of giant ground sloths and other North American great mammals such as mam... Age was responsible for the demise of prehistoric sloths has puzzled scientists because both events occurred at the same time, about 11,000 years ago. But by...

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

...eclined in diversity, such as the group containing sloths and armadillos. The researchers believe that our 'ancestors', and those of all other mammals on earth now, began to radiate around the time of a sudden increase in the temperature of the planet ?ten million years after the death of the dinosaurs....

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