Researchers have digitally reconstructed the leg muscles of an ancient human ancestor that lived 3.2 million years ago, revealing they could stand and walk upright like modern humans.
When the remains of an early human ancestor were found in Ethiopia in 1974, the discovery provided an unprecedented look at a species that lived millions of years before humans walked the Earth. The rare fossil, representing 40% of a skeleton belonging to a female Australopithecus afarensis, was named “Lucy,” for the Beatles song “Lucy in the Sky With Diamonds.” Now, researchers are using the skeleton to figure out how this ancient human relative moved 3.2 million years ago.
Wiseman used scans of Lucy’s fossil and data from humans to build a three dimensional model of the leg and pelvis muscles of Australopithecus afarensis. After collecting data from MRI and CT scans of muscle and bone structures in modern humans, the researcher digitally created a musculoskeletal model. Then, she used scans of Lucy’s fossil to determine how her joints were articulated and moved in life.
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