An analysis of the safety and efficacy of neti pots.
Cochrane reviews of all the literature on the topic:
Want to learn more about Naegleria fowleri and PAM?
Want to learn more about Caddo Lake in East Texas?
Pay special attention to encroaching Salvinia and the frequent Bigfoot sightings (most of which I am sure are just sightings of particularly inbred, hairy locals).