A massive species of spider from Asia has been colonizing large chunks of the southeastern United States over the last few years. The Juno spider is venomous, but the venum isn't believed to be a threat to humans, since the spiders have small fangs. They are also in Tennessee and the western Carolinas. The Joro is widespread in Japan, China and Korea. Experts found that the Joro spider has double the metabolism of the Golden Silk Spider and a 77% higher heart rate, allowing it to survive freezing temperatures that would kill many other large spiders.