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Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and...
Dogs are the domesticated subspecies of grey wolves.
An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.
Extinct species of fish which had thick ´armour´ protecting the head.
Why do camels have humps? Where do these extremely hardy animals live? Learn the answers from...
The California kingsnake is one of the most popular species of pet reptiles. It was named after...
The animation demonstrates the most important types of feathers and their fine structure.
Marsh harriers are birds of prey found almost worldwide.