You probably can’t remember every single fact or skill you were taught when you were at school. Our memories fade over time, and if we don’t practice the skills that we’ve been taught regularly, we eventually forget how to use them at all. That doesn’t just apply to individual people, though - that applies to the whole human race! There’s plenty of evidence that our ancestors had skills and abilities that we lack today, and this video contains all the proof of that you’ll ever need.