Adrian Pablos, researcher at the National Research Center on Human Evolution (CENIEH), participates in a comprehensive study of human remains from several species, recently published in the journal Royal Society Open Science, which suggested that the height and mass body advancing at different speeds in the genus Homo.
After analyzing more than 300 fossils postcranial skeleton around the world over a period spanning more than 4 million years ago until today, the authors of this study conclude that variation in body size in human evolution has not followed a straight line, and he has suffered surges in different periods.
"Until recently it was thought that the body was increasing progressively and jointly by weight and height, when in fact has grown through a pulse pattern and Stasis" explains Adrian Pablos.
El primer “pulso” ocurre con el origen de nuestro propio género hace alrededor de dos millones de años. En este período se observa un aumento tanto en altura (unos 20 centímetros) como en peso (entre 15 y 20 kilogramos). Y hace aproximadamente 1,5 millones de años poco después de la aparición de Homo erectus/ergaster, se produce otro aumento en la estatura (unos 10 centímetros), seguido un millón de años más tarde, de otro en el peso corporal (10-15 kilogramos).
"There are a couple of exceptions to this story: Homo floresiensis and Homo Naledi, whose remains recently discovered suggest that these species swam against the tide of increasing body size over time," says Pablos.
Fémures. (Photo: Cenieh)
But in general, our ancestors were higher around a million years before the body mass increased across the board. Thereafter, the height and average body weight are kept more or less equal in the lineage of hominids. (Source: CENIEH / DICYT)