In a coastal forest of the Philippines, a venomous 10-foot-long snake slithered along the ground. Something about the pale predator caught the attention of nearby scientists — and for good reason.

A scientist injected himself with poisonous venom over 850 times to create an ‘unparalleled’ anti-venom in his blood. Tim Friede let dangerous snakes bite him over 200 times in 18 years, even falling ...