A heavy hole captures light

Black holes are the heaviest of the universe, they attract all nearby matter, capturing the light in.

Heavy and light populations

Macao is the most populated state in the world with 16.068 people per km²

Groenlandia is the least populated in the world with 0,03 people per km²


http://it.wikipedia.org/wiki/Lista_di_stati_per_densit%C3%A0_di_popolazione