[dinoparty]

But matter contains mass by definition. That’s like saying that there must be some particle that gives liquid its liquidity.

[mvpel]

Right, but how do we know that a given chunk of matter has mass? It resists being moved when force is applied to it, and it exerts a gravitational pull.

But why does it resist being moved, and why does it exert a gravitational pull?

[UCANSEE2]

But matter contains mass by definition. That’s like saying that there must be some particle that gives liquid its liquidity.

Shhhhhhh....... don't confuse the scientists. They want to spend billions on a goose chase, let them. It's better than letting them work on the global warming thing.

[mad_as_he$$]

“In our time we have discovered that energy and matter a easily interchangable.” J.L. Picard, Captain, Star Fleet, United Federation of Planets, circa 2368AD.