There's endless campaign potential in a statistic like this, and even more for creative interpretation.

Maybe someone should print out 655,000 skulls on paper and hand them in to Downing Street. Or start piling plastic skulls outside Westminster. (Until arrested.)

v= volume
h= height
a= area of the base
s= length of the base along the ground.

Okay, imagine an egyptian pyramid. Square base, four sides. The volume should be v=(h*a)/2

Let's then say that the height is the same as the side of the base so a=s*s and h=s gives v=(s*s*s)/2

From your link we know that 655 000 skulls have a volume of 13100 cubic metres. That gives 13100=(s*s*s)/2 which gives 26200=s*s*s which gives that, the square root of three of 26200=s

I think. But I have lost my calculator so somebody else have to calculate s.

Peak oil is not an energy crisis. It is a liquid fuel crisis.