Is there any proper calculation regarding graphene to figure out whether or not it can withstand the pressure due to an elephant standing on a pencil, or is this an exaggeration?
Graphene is as the strongest material ever measured, some 200 times stronger than structural steel of same thickness. When elephant stands on the graphite (great multilayered graphene), its pressure make the layers separated out , since each layer is graphene so the net pressure will be diminished after some distance, but individual graphene layer can withstand with such a large pressure.