In the grand tapestry of Earth’s history, there once roamed colossal creatures that towered over the landscapes. These magnificent animals, now lost to time, were the giants of the land. From ...

A first-of-its-kind aerial survey of wildlife in South Sudan has helped confirm the world’s largest land mammal migration, and now we’ve even recorded evidence of it. The survey focused on the ...

In this corner, weighing up to 190 metric tons, is the blue whale. This behemoth still swimming in Earth’s oceans is the current titleholder for the heaviest animal to ever exist — living or ...

Discovery sheds new light on largest known animals on Earth. Whales, dolphins and porpoises belong to a group called cetaceans, which includes the largest known animals that ever lived, the two ...

The Titanoboa—the largest known snake to ever exist—was as long as a school bus, growing to an estimated 50 feet long and 3 feet wide.

The most massive animal to have ever lived is still swimming around today. The blue whale, Balaenoptera musculus , regularly tips the scales at over 100 tonnes. Some estimates have pegged ...

From the largest known sauropods ever discovered, including Argentinosaurus, Patagotitan and Futalognkosaurus, whose weight exceeded 60 tons (54.4 metric tons) and were bigger than a semitruck, to ...

The world’s oldest mammal has been identified using fossil dental records ... A shrew-like creature that lived 225 million years ago is the oldest mammal ever identified ...

The blue whale has long been considered the largest animal to have ever existed, even dwarfing the biggest known dinosaurs. But now a new species threatens to steal the crown, and upends what we ...

The blue whale may no longer be the largest animal ever The 37-million-year-old fossil bones were so large, experts thought they were boulders. They may have come from the heaviest animal that ...

During the Pliocene and Pleistocene Epochs lived a humongous sloth that grew to 20 feet long and weighed up to 8,000 pounds. Found in the woodlands and grasslands of South America, these sloths were ...