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PARIS - Three-toed sloths have a unique abdominal design -- their innards fixed to their lower ribs to avoid squashing the lungs while hanging upside down, a study said Wednesday. Credit: Getty Creative The South and Central American forest dweller, also known as the brown-throated sloth, spends a large part of its life hanging from its hind legs to reach young, tender leaves growing on the tips of branches, as well as to groom. With its slow metabolism, it may take the sloth a month to digest a single leaf, and it can store a third of its bodyweight in urine and faeces -- which it deposits about once a week. "This means that the stomach and bowel contents make up a considerable...

Scientists at a behavioral studies facility in Budapest set quite a tasks for themselves. They set out to analyze, with non-invasive methods, dog brains to see if our canine companions could detect emotions in both human and dog voices and to compare it to human brain activity when given the same stimuli. Credit: Getty Editorial The hardest part, in my opinion, must have been training 11 dogs to lie perfectly still for about 10 minutes while they were being scanned by an MRI machine. The neurobiologists chose Border Collies, Labrador Retrievers and Golden Retrievers for the study. (I myself would have chosen Basset Hounds or English Bulldogs, which would have been a leg up - or perhaps...

10 Cat Mutations

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T. Rex Had a Small, Cute Cousin

Toothy Tyrannosaurus rex had a tiny cousin, suggests new research. The dwarf dino, named Nanuqsaurus hoglundi, lived 70 million years ago in Alaska, according to a new study, published in the journal PLOS ONE. Tyrannosaurus rex bones on display at the Perot Museum. Credit: AP The skull for the newly identified dinosaur measured 25 inches long, compared to 60 inches for T. rex. The new dino was a tyrannosaur though, conclude researchers Anthony Fiorillo and Ronald S. Tykoski from the Perot Museum of Nature and Science and their colleagues. RELATED: Could These 10 Animals Be Resurrected? Tyrannosaurs marched around on two legs, loved meat and had a large skull relative to the size of...

A new dinosaur from Portugal is Europe's largest-ever terrestrial predator and was the biggest carnivorous dinosaur of the Jurassic Period, according to paleontologists who studied its remains. Credit: Getty Creative The dinosaur, named Torvosaurus gurneyi, measured close to 33 feet long and weighed over 2,200 pounds, according to a paper in the latest PLoS ONE. The predator was at the top of Europe's terrestrial food chain roughly 150 million years ago. RELATED: Oldest Dinosaur Nursery Found "The fauna of what is now Portugal was extremely diverse in the Late Jurassic," paleontologist Octavio Mateus of the Universidade Nova de Lisboa, and co-author of the study, said in a press release....