Sloths weren’t always sleepy tree-dwellers. In the Ice Age, they grew to the size of elephants and defended themselves with ...

Fossil skulls reveal how extinct mammals smelled the world, with new research linking olfactory bulb size to gene counts.

The sense of smell is vital for animals, as it helps them find food, protect themselves from predators and interact socially. An international research team led by Dr. Quentin Martinez and Dr. Eli ...

We now know how good the sense of smell was in giant sloths, sabre-toothed tigers and other long-lost species.

You know that person — the one who walks into the room and everyone's like, 'Oh, hey!' They just have that 'it' factor, and ...

Fatally infected ant pupae emit a precise chemical signal that triggers workers to disinfect—and sacrifice—them to stop disease spread.

International research and highly-specialized divers are bringing an underground, underwater world to the surface ...

The apparent docility and friendliness of “smiling” sloths have made them tourist darlings, but have also put a target on their backs. The rise in trafficking of these animals led the governments of ...