Many people have a silly idea in their heads that stone-age humans could not be as innovative and smart as we can because their technology was less advanced than ours.
They also look at an expertly-knapped spearhead like the ones in the thumbnail and think they could do that with a couple of rocks they find in their backyard.
These ancestors of ours were smart, they were creative thinkers, they made stone tools at an expert level that the average person today could not even hope to replicate. I love finding out new ways they were able to innovate.