New lower back fossils are the “missing link” that settles a decades-old debate proving early hominins used their upper limbs to climb like apes, and their lower limbs to walk like humans.
The 3.8 million-year-old fossil cranium represents a time interval between 4.1 and 3.6 million years ago, when A. anamensis gave rise to A. afarensis.
Researchers used morphological features...