Which may have been true in a world where gravity was a charge or like the other forces. But it isn't. Everything with mass has mass. There is no detection of any sort of anti-mass, no matter the exotic possibilities such a thing would enable.
Which may have been true in a world where gravity was a charge or like the other forces. But it isn't. Everything with mass has mass. There is no detection of any sort of anti-mass, no matter the exotic possibilities such a thing would enable.