King Cobras. These majestic snakes can grow to be 18 feet/5.4 meters long. They can literally “stand up” and look a 6-foot man in the eye. They kill and eat other snakes. Their venom is so lethal that it could kill dozens of adult humans. Every culture that lived with this snake in ancient times considered them an earthly incarnation of a god - some even refused to kill or harm them.