Long before today’s tree-dwelling sloths, a 4-ton giant roamed South America — and it may have stood and fought like a bear.

When the asteroid ended the age of non-avian dinosaurs, it cleared ecological space on a global scale. Small survivors ...

Sloths may look peaceful and harmless, but their survival strategy is one of the most extreme in the animal kingdom. With incredibly low speed, minimal strength, and almost no way to defend themselves ...

How a collection of London pigeons and Galápagos mockingbirds provided the receipts for Darwin’s biggest ideas.

Many large herbivores that once roamed modern-day Panama have declined or died out—including the 6-meter-long giant ground sloth and elephant-related creatures called Cuvieronius. New research ...

Commentary: People want to pack a lot of living into three springtime months. “Make hay while the sun shines. Hit the ground running.” ...

Amanda Panda and her friends Sarah the Sloth and Audrey Otter had a great deal of time to relax and chat as they watched the ...

Hanin Barghouthi, 24, is accused of supporting Hamas in a speech a day after the 7 October attacks. While pro-establishment crowds celebrate Khamenei's appointment as his father's successor, others ...

Amateur paleontologist Jason Howery discovered the 92-pound femur of an Ice Age mammoth in a lake in Nodaway County, Missouri ...

From “burping” your house to sloth biology, curling stones and cunning squirrels, this humor column mixes odd facts, bad ...

Let’s talk about what makes indoor go-karting different from your childhood memories of putting around some outdoor track ...

Scroll down for Spanish version, translated by co-author Felipe Franco-Gaviria)Introducing large herbivores in Panama's forests could fill the gap ...