Another Amazonian study of note

Geometry skills are innate, Amazon tribe study suggests

Tests given to an Amazonian tribe called the Mundurucu suggest that our intuitions about geometry are innate.

Researchers examined how the Mundurucu think about lines, points and angles, comparing the results with equivalent tests on French and US schoolchildren.

The Mundurucu showed comparable understanding, and even outperformed the students on tasks that asked about forms on spherical surfaces.