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Saving the Whooping Crane

From the Series On My Own Science

Whooping cranes once lived all over North America. But by the 1940s, only one tiny flock was left. These beautiful birds were in danger of dying out. Scientists decided to start a second… Read More →

  • Lexile: 580
  • ATOS: 3.8
  • Dewey: 598.3

Saber-Toothed Cats

From the Series On My Own Science

Do you know which ice-age animal had a body similar to a bear’s, a short stubby tail, and razor-sharp, 7-inch teeth? A Smilodon! Fierce predators, Smilodons were large saber-toothed cats that… Read More →

  • ATOS: 3.5
  • Dewey: 569'.74