Examine up close minute poison-arrow frogs Dendrobates auratus and D. pumilio on leaves
Arrow-poison frogs (Dendrobates auratus and D. pumilio).↵(19 sec; 3.2 MB)
Encyclopædia Britannica, Inc.
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NASA/Goddard Space Flight Center and the National Center for Supercomputing ApplicationsInfrared technology changes what we can see in space.
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Encyclopædia Britannica, Inc.A hurricane is essentially a large tropical storm.
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© Brian Owens/ReutersAurora borealis is also called the northern lights.
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© Open University (A Britannica Publishing Partner)What's the chemistry of hibernation?
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Encyclopædia Britannica, Inc.A leopard frog (Rana pipiens) eating an earthworm.
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Encyclopædia Britannica, Inc.The life cycle of a North American toad.
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Encyclopædia Britannica, Inc.Learn about tree frogs of American tropical rainforests. Adhesive disks on their feet help them walk on slippery leaves without sliding, and they lay eggs; within the egg mass, embryos can be seen twitching. The tree frog with a translucent underside is called a glass frog (family Centrolenidae). (42 sec; 7 MB)
