The Aymara, especially the elderly who didn’t command a grammatically correct Spanish, indicated space behind themselves when speaking of the future – by thumbing or waving over their shoulders – and indicated space in front of themselves when speaking of the past – by sweeping forward with their hands and arms, close to their bodies for now or the near past and farther out, to the full extent of the arm, for ancient times.

This is a very interesting perspective on time.