2 feb 4000000 anni a. C. - Australopithecus

Descrizione:

Fact 1: They could not speak yet
Fact 2: They stood on two legs AND could climb trees.
Fact 3: Their childhood was a lot shorter than human childhood.

Claim: I can infer from an Australopithecus skull that they are not as smart as us because their head is smaller than a human head.

Australopithecus did not migrate because of it not being smart enough or had no need to migrate.

Source 1:
http://www.columbia.edu/itc/anthropology/v1007/2002projects/web/australopithecus/austro.html
Source 2:https://www.humanjourney.us/discovering-our-distant-ancestors-section/australopithecines/