at—if you can get there, as it's only reachable by traveling via boat down the Colorado River on the rim of the Grand Canyon. A local river outfitter can hook you up with a rafting trip—and then all you have to do is look for Pumpkin Spring and its curious cauldron at Mile ...
Anyway. The post that fascinates me right now is one of the digressions: “Interlude B: The Nutrient Sludge Diet“. In this post, the author tells us about “a 1965 study in which volunteers received all their food from a ‘feeding machine’ that pumped a ‘liquid formula diet’ through...