Regarding this article, he could have at least linked to the original artist's Youtube video, rather than someone else's repost of it.
Make a cube of that side, a cubic meter. Fill that with water near the sea level and you get a volume of 1 Liter of water.
There are 1000L in a cubic meter, not one.
I have a theory that it's impossible to prove anything, but I can't prove it.