[dogpa]

Surely if they are colliding then they are no longer parallel.

[Confusion]

The Vice headline does not accurately reflect the article. The hypothesis is that interaction between parallel worlds could lead to the observed behavior we currently describe using quantum mechanics.

[brahadeesh]

I'm just spitballing here, may be they are not fully parallel. May be it's one aspect of the universe that's parallel to its counterpart of the other universes. Other characteristics of a universe could still interact with each other, thus making their presence felt.

[logfromblammo]

Only if you're into strictly Euclidian geometries. And don't call me Shirley.

[pc2g4d]

They must be logically parallel rather than geometrically parallel.

[dschiptsov]

This is a good one!)