54. Brazilian Wandering Spiders

Brazilian wandering spiders are our worst nightmare. Not only are they huge, but their poison is ridiculously potent. Dr. Sewlal provided a bit more insight to Live Science in 2014. She said, “When threatened, they’ll raise their first two pairs of legs. Their bites are a means of self-defense and only done if they’re provoked intentionally or by accident.” Touch them? No chance!