Methane gas can build inside a decomposing whale carcass and cause it to explode. Whales tend to explode after they die. We can’t blame you if you don't know this, but you don’t have to take our word ...

gosh, in my day backpacking in the Sierras we drank from the streams, no one had filters or iodine, we'd never heard of Giardia. fast forward to late 1980s, giardia is everywhere, filter everything, ...