Read the full experiment at http://www.stevespanglerscience.com/content/experiment/00000052 You’ve probably heard of rubbing two sticks together to make fire… but who would think of using large steel ball bearings to make fire?
Read the full experiment at http://www.stevespanglerscience.com/content/experiment/00000052 You’ve probably heard of rubbing two sticks together to make fire… but who would think of using large steel ball bearings to make fire?