We have all heard of them at some point in our lives: Bigfoot, the Yeti, Loch Ness, Roswell, etc. All of them hoaxes, no doubt, that have seeped into the collective cultural unconscious, but unworthy of serious scientific investigation. Other strange events continue to float around the cultural stratosphere, namely the Internet, and science can offer no explanation for them. Science aspires to explain it all, and has made considerable progress over the years. However, these phenomena have eluded the scientific method and continue to puzzle scientists. Here are 7 head-banging phenomena science can’t explain.