Jan. 25, 2006 — -- For anyone who struggled through high school geometry, ... One was designed to test the ability to recognize dissimilar geometric symbols.

One of those common geometric symbols is the circle. The circle plays a pivotal role in everyday life as tires on the cars we drive and the steering wheel that guides us to our destinations.

Fruit, Flower, Geometry. Symbols used to test whether baboons can pick out a non-matching symbol within a group. By The New York Times | Source: Mathias Sablé-Meyer, Stanislas Dehaene et al.