'Cavemen first got it from natural sources; rubbing sticks & sparking flint came later'
fire
LEFTOVERS: Cavemen first got it from natural sources; rubbing sticks & sparking flint came later
Cavemen first got it from natural sources; rubbing sticks & sparking flint came later
Cavemen first got it from natural sources; rubbing sticks & sparking flint came later
LEFTOVERS
fire
LEFTOVERS