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The American bison is the largest land animal in North America.
Living fossil, important stage in the evolution of tetrapods.
Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.
The largest of the great apes. During evolution humans diverged from gorillas around 6 million...
Fish-like marine dinosaurs which resembled dolphins; a good example of convergent evolution.
This animation presents some animals and plants that lived between the Devonian and...
Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.
The archaeopteryx shows characteristics of both birds and reptiles. It is probably the...