Title: Opcional

Text: We assume that a large brain, the use of tools, superior learning abilities and complex social structures are huge advantages. It seems self-evident that these have made humankind the most powerful animal on Earth. But humans enjoyed all of these advantages for a full 2 million years during which they remained weak and marginal creatures. Cada párrafo será una prueba.

Save test: Use esta opción si usted desea compartir esta prueba (sólo para usuarios autenticados).