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Extinct: Megafauna

Discover strange facts about prehistoric megafauna: giant ground sloths, terror birds, glyptodonts, Megatherium, and the enormous land animals that vanished...

13 articles
Dire Wolf: The Ice Age Predator That Wasn't Actually a Wolf
Megafauna

Dire Wolf: The Ice Age Predator That Wasn't Actually a Wolf

Dire wolves weren't closely related to modern wolves despite their name. Expert guide to these Ice Age pack hunters and their surprising evolutionary history.

Mar 7, 2026 8 min read
Giant Ground Sloth: The 4-Ton Sloth That Walked the Americas
Megafauna

Giant Ground Sloth: The 4-Ton Sloth That Walked the Americas

Giant ground sloths reached 4 tons and 6 meters. Expert guide to these massive extinct sloths that lived with early humans until 10,000 years ago.

Mar 6, 2026 9 min read
Glyptodon: The Car-Sized Armadillo of the Ice Age
Megafauna

Glyptodon: The Car-Sized Armadillo of the Ice Age

Glyptodons were armored mammals the size of cars with clubbed tails. Expert guide to these 2-ton relatives of modern armadillos.

Mar 5, 2026 9 min read
Megafauna Disappearances: Understanding the Causes
Megafauna

Megafauna Disappearances: Understanding the Causes

Expert-written guide exploring why Earth's largest animals vanished from every continent after human arrival. Covers the overkill hypothesis, climate change debate, continental case studies from Australia to New Zealand, and modern rewilding efforts including Pleistocene Park.

Mar 4, 2026 21 min read
Saber-Toothed Tiger: The Ice Age Predator With 18-cm Teeth
Megafauna

Saber-Toothed Tiger: The Ice Age Predator With 18-cm Teeth

Saber-toothed tigers had 18cm canines and hunted large Ice Age prey in packs. Expert guide to Smilodon and why these iconic predators went extinct.

Mar 3, 2026 10 min read
Short-Faced Bear: Largest Carnivore in the Americas
Megafauna

Short-Faced Bear: Largest Carnivore in the Americas

Short-faced bears stood 3.4 meters tall — the largest carnivore to roam the Americas. Expert guide to Arctodus simus, the Ice Age bear giant.

Mar 2, 2026 8 min read
Mammoth Extinction: Climate and Human Impacts
Megafauna

Mammoth Extinction: Climate and Human Impacts

Woolly mammoths survived on Wrangel Island until 4,000 years ago. Expert guide to why mammoths went extinct, who killed them, and de-extinction science.

Mar 1, 2026 10 min read
Woolly Mammoth and De-Extinction Science
Megafauna

Woolly Mammoth and De-Extinction Science

Comprehensive expert guide to the woolly mammoth covering anatomy, distribution, extinction causes, frozen specimens, and the current science and ethics of de-extinction through Colossal Biosciences and related gene-editing programs.

Feb 28, 2026 13 min read
Sabertooth Cat: The Famous Ice Age Predator
Megafauna

Sabertooth Cat: The Famous Ice Age Predator

Everything about the sabertooth cat: size, habitat, diet, hunting, extinction, and the strange facts that make Smilodon fatalis the most famous Ice Age predator of the Americas.

Jul 17, 2025 13 min read
Giant Ground Sloths: Ice Age Behemoths
Megafauna

Giant Ground Sloths: Ice Age Behemoths

Everything about the giant ground sloth: size, habitat, diet, claws, Darwin's Beagle fossils, Thomas Jefferson's Megalonyx paper, and why Megatherium americanum vanished 10,000 years ago.

May 20, 2025 14 min read
Giant Beaver: An Ice Age Rodent
Megafauna

Giant Beaver: An Ice Age Rodent

Everything about the giant beaver: size, habitat, diet, 15 cm incisors, extinction, and the strange facts that make Castoroides ohioensis the bear-sized Ice Age rodent that did not build dams.

Mar 21, 2025 13 min read
Diprotodon: Largest Marsupial Ever
Megafauna

Diprotodon: Largest Marsupial Ever

Everything about Diprotodon optatum: size, habitat, diet, the Lake Callabonna mummified herd, the 46,000-year-old extinction, the Bunyip oral tradition, and why this 2-tonne wombat-relative was the largest marsupial that ever lived.

Jan 20, 2025 15 min read
Aurochs: Ancestors of Cattle
Megafauna

Aurochs: Ancestors of Cattle

Everything about the aurochs: size, habitat, domestication, cave art, the 1627 extinction in Jaktorow Forest, Heck cattle, and modern back-breeding programs working to resurrect Bos primigenius.

Jan 19, 2025 15 min read