Cats 'control mice' with chemicals in their urine

Potent cocktail: Has this cat been manipulating mice with its urine?

Cat v mouse: it is probably the most famous predator-prey pairing, enshrined in idioms and a well-known cartoon.

And cats, it turns out, even have chemical warfare in their anti-mouse arsenal - contained in their urine.

Researchers found that when very young mice were exposed to a chemical in cat urine, they were less likely to avoid the scent of cats later in life.

The researchers had previously found that the compound - aptly named felinine - causes pregnant mice to abort.

Face of bizarre sea creature Hallucigenia revealed

Until now, scientists did not know what the head of Hallucigenia looked like

Scientists finally have a complete picture of what one of nature's most bizarre animals looked like.

The tiny sea creature - Hallucigenia - lived 500 million years ago, but all fossils appeared to be without heads.

Tiny Dracula ants hunting underground

Researchers have described six new species of strange subterranean ants from the genus Prionopelta.

Members of the ant genus Prionopelta are fierce, social predators that hunt down their prey with dagger-like teeth. These ants live throughout the tropics of the world, but usually go completely unnoticed for two main reasons.

Blue-eyed humans have a single, common ancestor

New research shows that people with blue eyes have a single, common ancestor. A team has tracked down a genetic mutation which took place 6-10,000 years ago and is the cause of the eye colour of all blue-eyed humans alive on the planet today.

What is the genetic mutation?

Crows are no bird-brains: Neurobiologists investigate neuronal basis of crows' intelligence

Crows are no bird-brains. Behavioral biologists have even called them "feathered primates" because the birds make and use tools, are able to remember large numbers of feeding sites, and plan their social behavior according to what other members of their group do. This high level of intelligence might seem surprising because birds' brains are constructed in a fundamentally different way from those of mammals, including primates -- which are usually used to investigate these behaviors.

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