“They learned to carry baskets on their heads”
It was easier to carry them in baskets than to carry them in their hands.
But it took one hand to hold the basket, and they often needed to have both hands free.
“They learned to make handles for their baskets”
So they learned to carry baskets on their heads and shoulders.
When the Cave-men jumped in time of danger, they were apt to lose their load.
“They made little pads to protect their foreheads”