The man behind Primitive Technology (which is shockingly successful in the 21st Century) has a hobby, which I bet you can guess: he likes to go out into the woods and re-create primitive technologies like stone axes, Goliath-killing slings, and various basic shelters. He is a man of few words—none, in fact, in his videos. The result is a fascinating look into what it would be like to survive by yourself in a world without technology, and an easy way to lose chunks of time watching him with rapt attention. Here's his most massive hit, "Building a primitive wattle and daub hut from scratch":