The masked shrew uses special abilities, such as reducing its body size, to stay warm and resilient during the cold winter.

The common shrew looks unremarkable, a few grams of fur and teeth scurrying under leaf litter. Yet this tiny mammal performs one of the strangest tricks in biology, shrinking its own brain and skull ...

“I will never forget that moment. I called out to the others. The little shrew looked like something we had only seen once ...