Rare Somali wild ass born in Chile zoo

A rare Somali wild ass has been born in a zoo in Chile, the fourth specimen of the critically endangered species to be born in the South American country, the zoo owner said.

Study reveals how leaf-cutting ants gauge leaf portion size

They might not be able to leap tall buildings with a single bound, but leaf-cutting ants are insect superheroes, capable of carrying leaf pieces up to six times their body mass to cultivate fungus in their borrows. But how ...

Centuries-old teenage mummy unearthed in Peru

The mummy of a teenager who lived roughly 800-1,200 years ago, complete with skin fragments and tufts of hair, has been unearthed on the outskirts of the Peruvian capital Lima, the leader of the excavation team said Tuesday.

Why orchid bees concoct their own fragrance

Male bees display a remarkable passion for collecting scents: they deposit scents from various sources in special pockets on their hind legs, thus composing their own fragrance. This behavior has been known since the 1960s. ...

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Leg

A leg is a weight bearing and locomotive structure, usually having a columnar shape. During locomotion, legs function as "extensible struts" - the combination of movements at all joints can be modeled as a single, linear element capable of changing length and rotating about an omnidirectional "hip" joint.

As an anatomical animal structure it is used for locomotion. The distal end is often modified to distribute force (such as a foot). Most animals have an even number of legs.

As a component of furniture it is used for the economy of materials needed to provide the support for the useful surface, the table top or chair seat.

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