Ancient mammals that lived in the time of dinosaurs were mostly the same dark-brown colour, according to a new study ...

Despite their name, killer whales (orcas) are actually dolphins.

Like most other mammals, dolphins give birth to live young. Dolphins usually give birth to only one calf at a time. Dolphin pregnancies last between 10 and 18 months, depending on the species.

Suni Williams and Butch Wilmore returned to Earth in a SpaceX capsule after problems with a Boeing vehicle set in motion an ...

All whales have typical mammalian characteristics. Whales are eutherian, or placental, mammals that give birth to live offspring. They have mammary glands, lactate, and nurse their young. Whales all ...

NASA astronauts Sunita Williams and Butch Wilmore successfully returned to Earth after an extended 286-day mission aboard the ...

All sides agree problems will persist as long as ranch and gray wolf territories in California overlap. What's the solution?

Most of us think of long lifespans and immediately picture giant tortoises or ancient oak trees. But the animal world is full ...

— Spade-toothed whales are the world’s rarest, with no live sightings ever recorded. No one knows how many there are, what ...

The charity People’s Trust for Endangered Species (PTES) is asking nature lovers to help them track changes in populations.