Trilobites

The ancestors of Arachnida and Crustacea belonged to the class Trilobita.

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Tiktaalik

A transitional form between fish and tetrapods, or four-limbed vertebrates.

The California kingsnake

The California kingsnake is one of the most popular species of pet reptiles. It was named after...

European mole

Moles are small subterranean mammals with modified, spade-like forelegs.

How do fish breathe?

Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.

European honeybee

Honeybees produce a sweet and nutritious substance, honey.

The meerkat

Curious little animal living in underground burrows in the African savannahs.

Sabre-toothed cat

Large, extinct species of cats named after the shape of their large canine teeth.

Spider silk, spider web

While the density of spider silk is less than that of nylon filaments, its tensile...

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