Malignant tumour found in 1.7m year old metatarsal
Cancer is the primary cause of death in industrialised countries and the second most common cause of death in the developing world. The condition not known to occur in non-chordates and is largely confined to the higher vertebrates. It is extremely ancient, with purported cases of neoplasm found in fossil fish from the Upper Devonian. It may therefore be assumed that hominins have always been afflicted by cancer, but evidence for malignant tumours is rare in the fossil record. The earliest example affecting an archaic human is a case of fibrous dysplasia from a Neanderthal rib dated to 120,000 years ago from the site of Krapina in northern Croatia. Continue reading
Study shows how dietary changes and stone tools enabled reductions in size of teeth, jaws and gut
In comparison to earlier hominins, Homo erectus was bigger both in stature and brain size. As such, its energy requirements would have increased – but paradoxically the teeth and chewing muscles were smaller, maximum bite forces weaker and the gut size was reduced. It has long been assumed that this was made possible by increased meat consumption, slicing and pounding food with stone tools, and by cooking. However, the latter was uncommon until around 500,000 years ago. By these means, it is believed that Homo erectus and later humans reduced the both amount of chewing required for their food and workload of the gut in digesting it. Continue reading
A team led by Lee Burger has announced the discovery of a new species of early human.
Professor Berger, an American palaeoanthropologist working at the University of the Witwatersrand, Johannesburg, is known for Australopithecus sediba, announced in 2010 and at the time was the first new hominin species to be discovered in South Africa for decades. The discovery was when Matthew, Lee’s nine-year-old son, discovered a hominin collar bone embedded in a rock at Malapa, part of a now-eroded cave system near to Sterkfontein and Swartkrans, where many important hominin finds have been made. Continue reading
Australopithecus deyiremeda was a contemporary of ‘Lucy’
Hominin remains comprising a complete lower jawbone, a partial lower jawbone and two partial upper jawbones, together with some accompanying teeth have been described as a new species, Australopithecus deyiremeda. The fossils were excavated in 2011 in the Woranso–Mille study area, central Afar, Ethiopia. They were found in deposits dated from 3.3 to 3.5 million years old, making Australopithecus deyiremeda a contemporary of Australopithecus afarensis (the species to which the well-known fossil ‘Lucy’ belongs) and the controversial hominin species Kenyanthropus platyops. The specific name deyiremeda means ‘close relative’ in the local Afar language and follows a now-established tradition of using local languages to name hominin species.
500,000-year-old shell cutting tool could explain Acheulean hand-axe puzzle
The teardrop shaped Acheulean hand-axe is without doubt the signature artefact of the Lower Palaeolithic, remaining in use for nearly one and a half million years. The tools first came into use about 1.75 million years ago and persisted until around 250,000 years ago. While chiefly associated with Homo erectus, they remained in use into the time of the larger-brained Homo heidelbergensis.
New skull with ‘enigmatic’ jawbone and differing tool technologies suggests that two different hominin groups are represented by Dmanisi remains.
The former Soviet republic of Georgia is located at the crossroads of Europe and Asia. Lying on the eastern shores of the Black Sea, it was the destination of Jason and the Argonauts in their quest for the Golden Fleece, but long before this it was a stopping point for the earliest-known hominin migration out of Africa. Continue reading
2.0 to 2.6-million-year-old tooth is from australopithecine or early human.
A reassessment of a fossil tooth from an old archaeological collection suggests that early hominins had extended their range to the western branch of Africa’s Great Rift Valley by no later than two million years ago. Continue reading