Comprehensive fossil studies dating back to four million years ago show that height and body mass have developed at different rates during the evolution of hominins. Homo sapiens, the only species still existing from this lineage.
Research published in the Royal Society Open Science magazine shows that body size increases with fluctuations in the form of pauses following a slight increase rather than a continuous increase. In some species, body size shrinkage is observed.
In this survey, 311 samples from the first steep durability crew of 4.4 million to modern humans were examined. This research is the most comprehensive study of hominin body size.
Researchers who describe physical evolution of classified hominin species as "a long, winding path with many dead ends streets and roads," researchers say that a burst of growth in key phases, as shown by data patterns, continues to pause for thousands of years.
Researchers are surprised to see that the length and mass are separated by about 1.5 million years ago. At this time, the hominins extended by 10 cm, but did not gain any weight for the next one million years. An increase of 10-15 kilograms in mass was realized 500.000 years ago
According to the authors of this work, which for the first time examined the millions of years of evolution of height and weight, the evolution of the weights and weights of hominins progressed simultaneously in the previous 1.5 million years.
Researcher at Gonville and Cainus College and instructor at the University of Cambridge Archeology Department. Manuel Will said, "Only an increase in size has created a thin appearance with longer legs, narrow hips and shoulders. This may be due to adaptation to the changing environment and the new hunting technique. During this period, Homo changed the environmental conditions for leaving the forests and moving to more arid African savannas. "
"The high surface-to-volume ratio given by a long and thin body may have facilitated the follow-up of animals that have been in the dry heat for hours. Because the larger skin area enhances the superficial evaporation capacity. "
"Subsequent mass increases correspond to periods when people move to higher latitudes. In the colder Eurasian climate, a wider mass has the advantage of adjusting body temperature. "
However, Dr. According to Will, these are valid theories, but the wide time intervals between fossil remains may be overshadowed by certain truths. In fact, Will and his colleagues are forced to predict their body size, often with disintegration and separation. These parts can sometimes be formed from only one toe bone.
() How can evolution be really lived?