Related topics: brain · memory · neurons · hippocampus

Changes in rat size reveal habitat of 'Hobbit' hominin

A study of rat body sizes shifting over time gives a glimpse into the habitat of the mysterious hominin Homo floresiensis—nicknamed the "Hobbit" due to its diminutive stature.

What causes rats without a Y chromosome to become male?

A look at the brains of an endangered spiny rat off the coast of Japan by University of Missouri (MU) Bond Life Sciences Center scientist Cheryl Rosenfeld could illuminate the subtle genetic influences that stimulate a mammal's ...

Ecuador eradicates Galapagos rats using drones

Ecuador used drones to scatter rat poison on one of the Galapagos Islands in a bid to protect species including the world's only nocturnal seagull from the pests, the archipelago's national parks authority, PNG, said Thursday.

'Stash your trash,' say rat researchers

Rats. Can't live with them, can't live without them—or so it seems in a city like Chicago. Researchers from Lincoln Park Zoo's Urban Wildlife Institute and Davee Center for Epidemiology and Endocrinology set out to understand ...

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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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