Missing gene in mouse sperm could explain infertility

Mice lacking a certain gene are unable to produce offspring because their sperm lack the connection between the tail and the head. A new thesis from the University of Gothenburg indicates a probable cause of male infertility.

War in Europe is more than 5,000 years old, researchers find

Conflict has existed throughout human history, and it has often been violent. Attacks, assassinations, raids, ambushes, and vendettas feature in archaeological records almost as far back as the origin of humankind itself. ...

This sea worm's posterior swims away, and now scientists know how

A research team, led by Professor Toru Miura from the University of Tokyo, shows how the expression of developmental genes in the Japanese green syllid worms, Megasyllis nipponica, helps form their swimming reproductive unit ...

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In anatomy, the head of an animal is the rostral part (from anatomical position) that usually comprises the brain, eyes, ears, nose and mouth (all of which aid in various sensory functions, such as sight, hearing, smell, and taste). Some very simple animals may not have a head, but many bilaterally symmetric forms do.

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