The rats found in New York are brown or Norway rats, rattus norvegicus. Exactly how many live here is anyone’s guess. Jonathan Richardson, a professor of biology at the University of Richmond who ...

The brown rat (Rattus norvegicus) represents one of evolution’s greatest success stories. Originally from northern China, these rodents now inhabit every continent except Antarctica, forming the ...

Rats are thin-tailed, medium-sized rodents, and you can find them all over the world. “True rats” belong to the genus Rattus, ...

The black rat (Rattus Rattus), also known as ship rat, roof rat or house rat. ... In Europe, North America and Britain, brown rats have developed resistance to anticoagulant rodenticides.

The brown rat, the R. norvegicus, originated somewhere in Central Asia, began to migrate westward early in the eighteenth century, and reached England around 1730.

Brown Rat, Rattus norvegicus, eating scraps of food left in a fast food resturant car park. Penrith, Cumbria. (Photo by: Farm Images/Universal Images Group via Getty Images) ...

A brown rat, the species commonly found in New York City and other major cities. Getty Images. Benji Jones is an environmental correspondent at Vox, covering biodiversity loss and climate change.

The four species sampled in this research were the native Muller’s giant Sunda rat (Sundamys muelleri), the Asian black rat (Rattus rattus), the Norway rat (Rattus norvegicus), and the Asian ...

A change to a single gene in the bacterium Yersinia pestis has enabled one of the world’s most notorious pathogens to survive for centuries.

A change to a single gene in the bacterium Yersinia pestis has enabled one of the world’s most notorious pathogens to survive for centuries.

WASHINGTON – Congressional Republicans on June 4 rallied to the defense of a Brown University student who was investigated by the Ivy League school after he sent administrators DOGE-style emails ...