SNAKE BITE

Every year hundreds of thousands of people die from snakebites and we're running out of anti-venom. Steve Ludwin's blood, now immune after thirty years of injecting snake venom, could solve this crisis.

In an uncertain future, you need to be prepared. Here's a first-aid guide.

The highest concentration of the most poisonous snakes in the world is about 90 miles off the coast of Santos, Brazil.