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.