Roy Lewallen wrote:

...

I'd say there were two possibilities the

1) It ain't happened yet--so it never will.

2) It ain't happened yet--because we don't yet know enough.

Frankly, I think those coming up with new ideas will subscribe to the
second ...

I do know that manganese dioxide can act as a catalyst in different
situations as to seem "magical." (i.e. over come bonds at lower energy
levels.)

Regards,
JS