The animal kingdom has a lot of crazy things; from insects that only have one eye and starts glowing in the dark, to dinner plate sized spiders. We are on a constant drive cover new animals, organisms, and other living creatures, in this planet, but some of them are not a welcome prospect to us.
Well, not many know, but the parasitic worms are some of the scariest living creatures in this planet. They are absolutely horrifying because they simply take over the body of the post and keep on eating up everything inside unless they are just a shell of their exterior. One amongst those notorious parasitic worms is the tapeworm which has the record of growing to the length of a football field which was found living in a human body.