Similarly, a study published in May in the journal Communications Biology found that elephants form complex "sentences" through their various rumbles, ear flags, trunk rubbings and other actions.

Yet her true love, a 19th-century dead guy, is in the graveyard, where she hangs out to make grave rubbings and daydream.

Dwan also took up painting, making one series from tree rubbings.

Visitors are invited to make rubbings, with paper, on their surfaces.

In New York, the quietist impulse hit a bump: paintings were based on rubbings he made of Manhattan sewer grates and manhole covers.