Known as the Ophiophagus hannah in the scientific world, the King Cobra’s name precedes itself. As the longest venomous snake in the world, these slithering beasts can grow up to a whopping 5.6 meters long! Although the venom in the king cobra is not as strong as some other snakes in the animal kingdom, it’s venom can kill a fully grown human within just 15 minutes. Yet, the power doesn’t stop there. If it strikes in the right place, a king cobra’s venom can kill an elephant in just 3 hours.