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Photo: Pepe Caspers
According to the findings in the Royal Society Open Science journal, early humans ranged from the broad, gorilla-like paranthropus to the thinner australopithecus afarensis. The hominins from four million year ago weighed 25kg on average and stood just over 4ft tall.
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Read More »Our ancient ancestors went through a tall and skinny phase around 1.5 million years ago, according to new research. The early humans hunted in African savannahs, which caused them to become tall and slender after leaving forest-like habitats. Researchers were surprised by the findings of the study, which looked at hundreds of fossils spanning four million years. They found that the stature and bulk of our ancient ancestors did not change consistently over the course of history. Around 1.5 million years ago, human-like hominins grew 10cm taller without gaining any extra weight. It took another million years for the species to put on another 10-15kg. Cambridge University's Dr Manuel Will, who led the project, said: "An increase solely in stature would have created a leaner physique, with long legs and narrow hips and shoulders. "This may have been an adaptation to new environments and endurance hunting, as early homo species left the forests and moved on to more arid African savannahs. "The higher surface-to-volume ratio of a tall, slender body would be an advantage when stalking animals for hours in the dry heat, as a larger skin area increases the capacity for the evaporation of sweat." When the species migrated to colder regions and higher latitudes, their bodies became fatter, the scientists said. Dr Will said large gaps in fossil records had made it hard to understand the evolution of humans, leaving his team to estimate body sizes from small fragments of bones. According to the findings in the Royal Society Open Science journal, early humans ranged from the broad, gorilla-like paranthropus to the thinner australopithecus afarensis. The hominins from four million year ago weighed 25kg on average and stood just over 4ft tall. Our own species family - homo - appeared about 2.2 to 1.9 million years ago and saw a hike in height and weight. Humans have maintained the height and weight they have today following the emergence of homo erectus. Dr Will said: "From a modern perspective this is where we see a familiar stature reached and maintained.
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