This Month in Photo of the Day: Animal Pictures

Jameson's mambas, like the one here in Cameroon, have hollow fangs that deliver toxins that can lead to respiratory paralysis—and a person's death within hours. But scientists are working to unlock the medical potential of venom, and soon the toxins from snakes like the mamba may combat heart disease or other ailments.

See more pictures from the February 2013 feature story "The Bite That Heals."

Learn about National Geographic Explorer Mattias Klum »
See a photo gallery of snakes »