Saw a science program and it reminded me of my phychembio days and It reminded of the many questions no one then was able to explain to me. Even now Google just made it worse, so let me start at the beginning and ask this, who discovered that every /body/thing/particle has a mass?

2) How did he discover it and where (not place) but the thing itself?

3)Can I see what he saw and see it myself?

Knowing this would aid me in understanding weight which I know has to do with gravity and besides na day one we dey see and use everyday, so I would really love to know what mass is about and compare it with weight for myself.