If humans have been in our current form for 250,000 years, why did it take so long for us to progress yet once it began it’s in hyperspeed?

Question

We went from no human flight to landing on the moon in under 100 years. I’m personally overwhelmed at how fast technology is moving, it’s hard to keep up. However for 240,000+ years we just rolled around in the dirt hunting and gathering without even figuring out the wheel?

In: 15733

Answer 1

“if I have seen further [than others], it is by standing on the shoulders of giants.” — Sir Isaac Newton

In the absence of giants, stacking up a thousand generations of midgets may suffice.
After that, exponential growth takes over.