Related topics: brain · memory · neurons · hippocampus

Naked mole rats speak in dialect

Some people converse in Creole, while others speak Scots, but it's not only humans who can be identified by the diversity of language they speak. Naked mole-rats have their own dialects, too. Shared dialect also strengthens ...

Study shows 'Bystander Effect' not exclusive to humans

A rat is less likely to help a trapped companion if it is with other rats that aren't helping, according to new research from the University of Chicago that showed the social psychological theory of the "bystander effect" ...

Mole rats are pain-free, thanks to evolution

African mole rats are insensitive to many kinds of pain. As an international research team led by the MDC's Gary Lewin reports in Science, this characteristic has allowed mole rats to populate new habitats. Thanks to a genetic ...

Study shows city rats eat better than country rats

A pair of researchers, one with Trent University in Canada, the other the University of Manchester in the U.K. has found evidence that rats living in cities have a much richer diet than rats living in the country. In their ...

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Rat

50 species

Stenomys Thomas, 1910

Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus. Many members of other rodent genera and families are also called rats and share many characteristics with true rats.

Rats are typically distinguished from mice by their size; rats are generally large muroid rodents, while mice are generally small muroid rodents. The muroid family is very large and complex, and the common terms rat and mouse are not taxonomically specific. Generally, when someone discovers a large muroid, its common name includes the term rat, while if it is small, the name includes the term mouse - scientifically, the terms are not confined to members of the Rattus and Mus genera. Compare the taxonomic classification of the Pack rat and Cotton mouse.

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