Watch: In Sub-Zero Temperatures, This Cat Saves An Abandoned Baby From Certain Death.

Abandoned in a stairwell in sub-zero temperatures, a newborn baby was saved from a certain death by a stray cat who kept the infant warm for several hours.

The hero feline, named Masha, jumped into the box where the baby had been left and kept him warm until residents of the apartment building, alerted by the infant’s cries, found the cat curled around the freezing boy and licking his face.

The incident took place in Obninsk, in the Kaluga region of Russia. The baby was taken to a hospital where he was examined by medics. He was declared fit and healthy, despite hours spent in the cold.

1. In sub-zero temperatures, this cat saves an abandoned baby from certain death.

Following are our most viral videos for the past month — have fun!