Spiders are one of the scariest creatures that come to one’s mind. Just the sight and thought of these creepy crawlers can give you the shivers down your spine. Though not all the 40,000 species of spiders are harmful, it could be very difficult to identify those that are completely safe. The poison from a spider bite affects each person differently. It depends on the strength of your immune system and how lethal the venom is. The gravity of spider venom ranges from mild to severe. The list below is a compilation of 7 of the most dangerous spiders on the face of the earth.