Freshwater fishes

Many freshwater fishes are also popular as food.

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Monsters of the Palaeozoic: sea scorpions

Eurypterids are an extinct group of Palaeozoic aquatic arthropods.

Planaria gonocephala

One of the most common types of flatworms.

Pteranodon longiceps

A prehistoric flying reptile, similar to birds. However, there is no direct evolutionary link...


A type of prehistoric reptile having bony plates on its back, which aided thermoregulation.

Fat-tailed scorpion

The fat-tailed scorpion is one of the world's most dangerous scorpions.

The green iguana

A film about the green iguana, the popular inhabitant of exotic terrariums.

The rhinoceros family

The main characteristic of the rhinoceros is the horn at the front of its skull, which it uses...


Predators on top of the food chain prey on other animals. Their relationship is hunter and hunted.

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