or log in
A group of fish characterised by a cartilaginous skeleton, well-known species include the...
Eurypterids are an extinct group of Palaeozoic aquatic arthropods.
The poisonous bite of the Chilean recluse spider poses a serious threat to human health.
A video about the mammals living in the cold climate zones of the Earth, like the polar bear,...
For centuries, the Eurasian eagle owl has been the symbol of wisdom and knowledge.
Otters are semi-aquatic predatory mammals.
The anatomy of annelids is demonstrated through the example of the common earthworm.
The Arctic tern is famous for its long migration route: it flies from the Arctic to the...