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Prehistoric Ancestors of Modern Animals

From the Series If Extinct Beasts Came to Life

What if elephants were as small as dogs? What if frogs were protected by armor? In prehistoric times, they were! In fact, other than a few unique changes, lots of prehistoric beasts looked… Read More →

  • Lexile: 970
  • Dewey: 560

Prehistoric Giants

From the Series If Extinct Beasts Came to Life

Gorillas can be pretty big, but just wait until you see Gigantopithecus. This huge ape lived 9 million years ago and was three times as heavy and two times as tall as a modern gorilla. There… Read More →

  • Lexile: 1020
  • Dewey: 560

Prehistoric Predators

From the Series If Extinct Beasts Came to Life

Did you know that dinosaurs weren't the only prehistoric beasts on Earth? Even before the time when dinosaurs lived, there were many other incredible creatures, and some were even bigger and… Read More →

  • Lexile: 960
  • Dewey: 560

Prehistoric Sea Beasts

From the Series If Extinct Beasts Came to Life

The ocean is filled with giant, strange, and scary creatures such as whales, octopuses, and sharks—but the prehistoric megalodon was powerful enough to crush a killer whale. Other sea beasts… Read More →

  • Lexile: 1020
  • ATOS: 6.1
  • Dewey: 567/.09162

Creatures of the Deep

From the Series Real-Life Monsters

Dive down to the watery depths and encounter the ten strangest creatures living in the oceans. You'll discover: ● a fish with an angling light ● a snail that harpoons its prey ● a squid… Read More →

  • Lexile: 1060
  • ATOS: 6.5
  • Dewey: 591.77

Creatures of the Rain Forest

From the Series Real-Life Monsters

Track down the ten most awe-inspiring animals in the rain forests of the world. Step away from those jaws, claws, and muscles, because here you'll find: ● the largest snake in the world ●… Read More →

  • Lexile: 1020
  • ATOS: 6.2
  • Dewey: 591.734

Creepy, Crawly Creatures

From the Series Real-Life Monsters

Look closely at the ten most amazing insects and spiders that buzz, dart, and hang out all over the world. Beware of those bites and stings as you encounter: ● a hornet that will chase… Read More →

  • Lexile: 950
  • ATOS: 5.9
  • Dewey: 595

Dinosaurs Rule

From the Series Prehistoric Field Guides

Come along with Ackerley the Acanthostega to visit the Triassic and Jurassic periods, 203-145 million years ago. Watch the first dinosaurs appear. See them grow in size and numbers to… Read More →

  • Lexile: 960
  • ATOS: 6.2
  • Dewey: 567.9

Scaly, Slippery Creatures

From the Series Real-Life Monsters

Discover the ten most bizarre snakes, lizards, and other reptiles on the planet. Many lived at the time of the dinosaurs. Could this explain their grotesque features? Check out: ●… Read More →

  • Lexile: 1100
  • ATOS: 6.5
  • Dewey: 597.9

The Dawn of Planet Earth

From the Series Prehistoric Field Guides

Join Ackerley the Acanthostega and travel back in time 4,500 million years to the Precambrian period, when our planet first formed. Witness the appearance of the very first organisms in the… Read More →

  • Lexile: 960
  • ATOS: 6.2
  • Dewey: 576.8

The Last Days of the Dinosaurs

From the Series Prehistoric Field Guides

Follow Ackerley the Acanthostega through the Cretaceous period, 145 to 66 million years ago, when the mightiest dinosaurs stalked the planet. Watch them seek prey, battle enemies, and finally… Read More →

  • Lexile: 1000
  • ATOS: 6.2
  • Dewey: 567.9

The Rise of Mammals

From the Series Prehistoric Field Guides

Team up with Ackerley the Acanthostega to travel back 66 million years to the Tertiary and Quaternary periods of prehistoric Earth, when mammals came to dominate the planet. Many of them are… Read More →

  • Lexile: 1000
  • ATOS: 6.3
  • Dewey: 569