Where are the Andes Mountains? South America
The Andes mountains run down the Pacific side of South America When did the Andes form? About 199 million years ago, near the beginning of the Jurassic period, was the [...]
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06, 2017
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06, 2017
Jurassic Period – dinosaurs and ferns
A dinosaur skeleton from the Jurassic period How the Jurassic period began When the Jurassic period began, about 199 million years ago, a lot of animals had just become extinct [...]
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05, 2017
What are ferns? Plant biology and evolution
What are ferns? Ferns growing in a forest When did ferns evolve? The first ferns - the first plants that had leaves - evolved from plants that were more like [...]
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05, 2017
What are cycads? Evolution and Biology
Cycad trees. They look like palm trees but they are very different! At the end of the Carboniferous period, about 300 million years ago, the only kinds of plants on [...]
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05, 2017
What are dinosaurs? Evolution and Biology
A dinosaur skeleton: evolution of dinosaurs When did dinosaurs evolve? The first dinosaurs evolved out of earlier types of chordate reptiles about 230 million years ago, on the big land [...]
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05, 2017
How do Opossums carry their babies? Biology
Opossum The earliest mammals, about 200 million years ago, hatched from eggs and then got milk from their mothers, like the duck-billed platypus. But soon after that, about 125 million [...]
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05, 2017
History of Birds – Biology
A robin sits on a branch: birds biology When did birds evolve? The first birds evolved out of earlier small dinosaurs late in the Jurassic period, about 150 million years [...]
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05, 2017
Why do mosquitoes bite? Biology
Mosquitoes bite people: A mosquito on human skin Like bees, mosquitoes evolved from earlier flies and dragonflies about 200 million years ago, during the Jurassic period. Mosquitoes have six legs like [...]
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05, 2017
What are arthropods? Biology
Bee on a flower What are arthropods? Insects, spiders, crabs, and lobsters are all arthropods, so there are a lot of arthropods on Earth. Annelid worms All our biology articles [...]
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05, 2017
Evolution of Grasshoppers – Biology
Evolution of grasshoppers: Grasshopper sitting on a leaf Why do grasshoppers jump? When grasshoppers first evolved from earlier insects, about 300 million years ago, they lived in forests of huge [...]
