Corn snakes, also known as red rat snakes, originate in North America and can grow up to 180 centimeters (70 inches) long.
How antivenom is made has changed little over the last 125 years
A black mamba snake, just one of the 16 species of venomous snakes Friede let bite him
Researchers hope his hyper-immunity could lead to the development of a universal antivenom
Tim Friede has allowed himself to be bitten by snakes more than 200 times
Tim Friede was feeling particularly down on the day after the September 11 attacks, so he went to his basement and let two of the world's dead…
The gold-ringed cat snake in attacking position