In the Andes Mountains of northern Peru, a long-tailed mammal with a “facial mask” moved through the undergrowth. Suddenly, ...

The Chachapoyas mouse opossum can reach over 10 inches in length, the study said. Its head has a “remarkably narrow and long” snout and a “blackish facial mask.” ...

The Chachapoyas mouse opossum can reach over 10 inches in length, the study said. Its head has a “remarkably narrow and long” snout and a “blackish facial mask.” ...

About 1,000 Mickey Mouse respirators were eventually produced, but the civilian gas mask — for children or adults — was not really a notable presence on the home front during World War II.

The Chachapoyas mouse opossum can reach over 10 inches in length, the study said. Its head has a “remarkably narrow and long” snout and a “blackish facial mask.” ...