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Gradual metamorphosis, incomplete and complete metamorposis are common among insects.
The Arctic tern is famous for its long migration route: it flies from the Arctic to the...
Eurypterids are an extinct group of Palaeozoic aquatic arthropods.
A transitional form between fish and tetrapods, or four-limbed vertebrates.
Moles are small subterranean mammals with modified, spade-like forelegs.
Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and...
This video explains why the Barbary sheep on the savannahs bear such a strong resemblance to goats.
The dodo is an extinct species of birds that used to be native to the island of Mauritius. It...