I did not talk to an “ancient cave man” lately. Did you?
On second thought, I think it was those cavemen that discover the taming of fire. Well there you have it, trial and error, the roots of the scientific method. We should thank our cavemen ancestors, for their discovery touch more lives than any other discovery throughout the ages.
Remember that, next time you play with fire to cook, heat your home during our global warming, fly on in a jet, drive your car, etc. Oh yes, no taming of fire, no iPhones.