Sponge

The most ancient group of animals, they live underwater, lack real tissues and body symmetry.

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Ammonites

An extinct group of Cephalopoda, with solid external skeletons. They are excellent index...

Zebra

The striped horse of the savannahs that pedestrian crossings were named after.

The reproduction and development of insects

Based on their life cycle, insects can be grouped into three categories: ametabolous,...

Arctic tern

The Arctic tern is famous for its long migration route: it flies from the Arctic to the...

Eastern grey kangaroo

One of the largest marsupials.

Carboniferous flora and fauna

This animation presents some animals and plants that lived between the Devonian and...

Grass snake

A type of snake with a characteristic spot on its neck.

How to train your seal

How do attendants prompt seal pups to do what they are asked to? They are even willing to come...

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