Unlike nearly every mammal that has seven vertebrae in its neck no matter how long or short its neck, sloths stand out as oddballs with up to 10.

The only mammals which have evolved different numbers of neck vertebrae without any apparent problems are sloths and manatees. Two-toed sloths (Choloepus) have 5-7 neck vertebrae while three-toed ...

The sloth family tree once sported a dizzying array of branches, body sizes and lifestyles, from small and limber tree climbers to lumbering bear-sized landlubbers. Why sloth body size was once so ...

This sloth shutdown was sloooooooow moving. After 18 months, Long Island officials finally put an exotic animal store — and its seven sloths — out of business. Larry Wallach charged $50 a pop ...

If in need of a different perspective, consider seeking out some sloth-to-human empathy, writes Patricia Schultheis.

Sloths, the world's slowest mammal, have been around for 64 million years. Sharyn Alfonsi traveled to Costa Rica to learn more about how they've survived.

Imagine standing face to face with a giraffe, your neck craned back as you gaze up at this gentle giant towering over you. At ...

A potentially deadly virus known as “sloth fever” has US officials on alert after Florida reported 20 travel-related cases, including nine last week. Oropouche virus is spread through the ...

A potentially deadly virus known as “sloth fever” has US officials on alert after Florida reported 20 travel-related cases, including nine last week. Oropouche virus is spread through the ...

Two sloth bear cubs born at the San Diego Zoo in late 2024 made their first public appearance on Thursday. The zoo shared a clip of the cubs emerging from their private den with their mother Shala.