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What will the Earth look like in 50,000 years?
science.howstuffworks.com/life/evolution/earth-50000-years.htm
The Earth in 50,000 years will most likely be a very different place. Learn about the Earth in 50,000 years in this article.
How Saber-tooth Cats Worked
science.howstuffworks.com/environmental/earth/geology/saber-tooth-cat.htm
Saber-tooth cats are perhaps the most well-known extinct felines. Learn about saber-tooth cats and the behavior patterns of saber-tooth cats.
10 Cretaceous Animals That Weren't Dinosaurs
animals.howstuffworks.com/animal-facts/10-cretaceous-animals-that-werent-dinosaurs.htm
The dinos hog all the Cretaceous headlines. Do you have any idea what else scurried, hopped and otherwise cruised around Earth before the K-T mass extinction?
Mammoth vs. Elephant: Same Family, Different Species
animals.howstuffworks.com/animal-facts/mammoth-vs-elephant.htm
It’s the ultimate throwback face-off: mammoth vs. elephant. These two giants share a lot of DNA, but their differences are buried in the fossil record and written across their anatomy. One is an extinct species, the other still roams Earth’s forests and savannas.
Alligators Go Back 6 Million Years Further Than Thought
animals.howstuffworks.com/reptiles/alligator-species-8-million-years-old.htm
How old is the American alligator species? Learn more about a new study on the age of the alligator species in this HowStuffWorks Now article.
How Megalodon Worked
animals.howstuffworks.com/extinct-animals/megalodon.htm
The megalodon was born as big as an adult great white and grew to weigh as much as 7 Tyrannosaurus rex. Learn all about the megalodon.
All About the Megalodon, Shark Giant of Prehistoric Times
animals.howstuffworks.com/extinct-animals/megalodon-shark.htm
The megalodon shark has intrigued scientists and the public alike with its nearly unfathomable size and power. Once ruling the ancient oceans, this prehistoric predator is often cited as the largest shark to have ever lived and even inspired a Jason Statham movie franchise.
What Was the Biggest Dinosaur? Here Are the 4 Best Estimates
animals.howstuffworks.com/dinosaurs/biggest-dinosaur.htm
Determining the biggest dinosaur is a tricky process. Dinosaurs are extinct, so scientists can't simply go out and measure the world's biggest dinosaurs.
What's the difference between a mammoth and a mastodon?
animals.howstuffworks.com/extinct-animals/difference-between-mammoth-mastodon.htm
Mammoths and mastodons have a few significant differences. Learn more about the difference between the prehistoric animals at HowStuffWorks.
Meet Gigantophis garstini, an Enormous Prehistoric Snake
animals.howstuffworks.com/extinct-animals/gigantophis-garstini.htm
Before the 2003 discovery of Titanoboa cerrejonensis, Gigantophis garstini was known as the largest snake to ever roam the Earth.