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sloths in Biological News

Dung happens and helps scientists

...ta allow him to determine when and how an animal evolved and became extinct. The collection includes dung from modern animals to prehistoric ground sloths and 40,000-year-old mammoths. Molecular biologists in Denmark, Australia and Canada are using pieces from NAU's dung collection to compare its DNA ...

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

...ups have since either died out completely, such as Andrewsarchus (an aggressive wolf-like cow), or declined 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...

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 occurre...eagues found the last record of West Indian ground sloths coincided with the arrival of humans 4,400 years a...

Ancient DNA confirms single origin of Malagasy primates

... DNA from nine subfossil individuals in two of the more bizarre extinct species, Palaeopropithecus and 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, whic...

Oxygen increase caused mammals to triumph, researchers say

...e more oxygen, the bigger the mammals. We argue that the rise in oxygen content allowed mammals to become 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 articl...
sloths in Biological Technology

First electrophysical recording of sleep in a wild animal

...rophysiology of sleep in a wild animal, three-toed sloths carrying miniature electroencephalogram recorders slept 9.63 hours per day6 hours less than captive sloths did, reports an international team of researchers ...next three to five days. The activity of two other sloths was monitored via radio-telemetry collar alone, fo...
sloths in Biological Definition

Charles Darwin

...coming anatomist who agreed to work on the fossil bones at his Royal College of Surgeons . Owen's surprising revelations of extinct giant rodents and sloths confirmed Darwin's place in the scientific establishment. With Lyell's enthusiastic backing Darwin read his first paper to the Geological Society of ...
sloths in Biological Dictionary

Marsupials

...resentation in the fossil record. Learn about mammal ... opossum is the only marsupial that lives north of Mexico. ... Marsupials . Anteaters, sloths and Armadillos. Insectivores. Tree Shrews ... Marsupials are mammals that are found mostly in Australia. ... All female marsupials give "prem...
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