Kenyan footprints show Paranthropus was larger than expected, while La Brea vertebrae carry possible signs of nerve tumours in saber-toothed cats. The measurements broaden the physical picture of both animals.
At GaJi10 beside Lake Turkana, 21 footprints left by eight Paranthropus boisei individuals date to about 1.43 million years ago. Their dimensions indicate stature up to 1.8 metres and mass near 75 kilograms, comparable with Homo erectus in the same environment. The result weakens an older picture of Paranthropus as markedly stockier. The proposal that most trackmakers were adult males is an inference from footprint size.[1]
Among 3,722 Smilodon fatalis vertebrae in the La Brea Tar Pits Museum collection, three showed foraminal widening consistent with a spinal nerve tumour. Using 849 sacra as the minimum number of individuals, the team estimated 353 cases per 100,000. The collection also contained 32 incomplete arches, 48 fused vertebrae and 226 transitional vertebrae. Fossils preserve no soft tissue for a definitive diagnosis, so this is a collection-based estimate rather than prevalence in the living population.[2]
The studies turn different fossil archives into information about bodies. A Kenyan walking surface preserves the size and shared movement of eight individuals in one moment, while the La Brea collection exposes rare changes among thousands of vertebrae. The first narrows the assumed size gap between Paranthropus and Homo erectus; the second documents spinal problems in saber-toothed cats. Footprints cannot establish a permanent social order, nor can three vertebrae establish a species-wide disease rate, but both datasets add physical detail to older portraits.[1], [2]
