Here are the animals with the fastest-acting venom on Earth. First up: spiders. There are around 40,000 species of spider and most are venomous. But, thankfully, only a handful pose a threat to ...

These are the most dangerous ocean animals. Humans killed ... known as the Crocodile Hunter. While deaths are not common, there still are about 1,500 yearly stingray attacks in the U.S. alone.