The ancestors of Arachnida and Crustacea belonged to the class Trilobita.
Several analogous types of eyes have developed independently through convergent evolution.
Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.
The fat-tailed scorpion is one of the world's most dangerous scorpions.
During the evolution of vertebrates the relative development of brain areas has changed.
Pearls, often used as gemstones, are the by-products of certain molluscs' protective...
One of the largest marsupials.
A species of mollusc widespread in freshwaters.
Red deer are even-toed ungulates, ruminants. Their males have spectacular antlers.
The pericarp of real fruits develops from the carpel, while the pericarp of pseudofruits...
Enzymes are protein molecules catalysing biochemical reactions. Their activity can be...
The anatomy of annelids is demonstrated through the example of the common earthworm.
An ant colony consist of a queen, male ants and workers.
Honeybees produce a sweet and nutritious substance, honey.
Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy,...
This animation demonstrates how horse chestnut trees change throughout the seasons
Widespread heterotrophic unicellular organisms with constantly changing shapes
The most ancient group of animals, they live underwater, lack real tissues and body symmetry.
Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group...
A type of herbivorous dinosaur easily recognisable by its large frill and three horns...