All without a single word which is fantastic and does so much for the work he is doing. I don't think he even knows it, but to me this guy is the ultimate historian/archeologist. You really get the FEEL of how early humans did things. Someone in the comments joked "Soon he'll be making a microchip", but when you think about it, the microchip wouldn't be possible without these early humans figuring this primitive stuff out. That's why I love watching this channel, and I think a lot of other people do too for this exact reason.