I think parasites are pretty cool while also being very disgusting. A while ago, Trevor and I talked about a
wasp parasite that makes spiders weave a cocoon for its young. I'm glad I'm not a spider.
And then there's
this awesome video of fungus spores taking over the brains of bullet ants.
And I also happened upon a gross conglomeration of the
worst parasites of evar, but I think the fungus takes the cake.