Related topics: brain · memory · neurons · hippocampus

Genetics breakthrough in sea urchins to aid in biomedical research

Marine biologists at Scripps Institution of Oceanography at UC San Diego have created a line of sea urchins whose genetic makeup is fully mapped and can be edited to study human disease genes. The creation of these new research ...

The secret to a longer lifespan? Gene regulation holds a clue

Natural selection has produced mammals that age at dramatically different rates. Take, for example, naked mole rats and mice; the former can live up to 41 years, nearly ten times as long as similar-size rodents such as mice.

Oh, rats! As New Yorkers emerge from pandemic, so do rodents

They crawled to the surface as the coronavirus pandemic roiled New York City, scurrying out of subterranean nests into the open air, feasting on a smorgasbord of scraps in streets, parks and mounds of curbside garbage. As ...

An easily reversed hydrogel male contraceptive

A team of researchers working at China's Fourth Hospital of Harbin Medical University has developed a new kind of male contraceptive that is easily reversed. In their paper published in the journal ACS Nano, the group describes ...

'I know this song!' Evolutionary keys to musical perception

How do we perceive music and sounds? This question is the basis of the research by the Language and Comparative Cognition Group (LCC) of the UPF Center for Brain and Cognition (CBC) published recently in the journal Animal ...

High-ranking naked mole-rats are more resilient

Naked mole-rats are full of surprises. The latest is that higher-ranked mole-rats most likely have an immunological advantage over animals with lower social status, a discovery made by Professor Gary Lewin's lab at the MDC. ...

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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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