How does anti-matter fall?

[CloudWatcher]

So does anti-matter fall up or down? CERN is trying to find out ....

Also ...

New antimatter gravity experiments begin at CERN

If it falls up, I hope they call it Upsidaisium!

[pangaia]

1. Bucky Fuller used to use the terms "in" and "out" in stead of up and down.

Wise man.

[cstanleytech]

2. Seeing as we have not detected much anti matter in the wild in the universe I suspect

its because gravity attracted it and matter together in the early universe and most of the anti matter was annihilated thus the answer will probably be that anti matter does in fact "fall" down.
As to if its at the same rate as regular matter I have no idea but again I lean towards it doing so.

[eppur_se_muova]

3. But if matter and antimatter were only attracted to their own kind, and repelled each other ....

i.e. the opposite of Coulomb's Law for electric charge ... they would "self-segregate", with big clumps of matter and big clumps of contraterrene matter both having swept the surrounding space free of "the other". It would be hard for matter and antimatter galaxies, for example, to collide, because they would be repelling each other all the way to contact.

Given that there appears to be a tremendous amount of "dark matter" in the universe -- matter which is attracted to normal matter, or it wouldn't have been detected -- I tend to doubt that, though. But if "dark matter" were gravitationally attracted to BOTH normal matter and antimatter, that could still be a possibility !

[cstanleytech]

4. Except if such anti matter galaxies existed we should see the repelling effects in the

universe but we don't thus its unlikely many if any exist.
Also its not that the matter and anti matter were attracted to each other rather its that gravity which is a universal force attracted them both.