[Spakman]

I really have difficultly seeing how this could be considered anything other than natural. We, our actions and our impacts on the rest of the environment are, after all, born of the very same nature.

[craftyguy]

Well, by that loose definition, there is absolutely nothing that is not 'natural.'

[Spakman]

Yeah, I agree with that!

[popcorncolonel]

"Natural" is defined as: existing in or caused by nature; not made or caused by humankind.

So by definition, there are things that are natural, such as other galaxies, and all things a million years ago.

[aorloff]

Things that are natural : all galaxies, including ours.