Leukemia signs are often caused by problems in a child’s bone marrow. When leukemia cells build up in the marrow, they can ...

When people donate blood, stem cells in the bone marrow make new blood cells to replace what was lost. This stress can drive the selection of certain clones—groups of blood cells with a slightly ...

A US team of researchers has uncovered 27 bone tools made by human ancestors about 1.5 million years ago. While older bone tools have been discovered, similar examples of bone tool kits occur ...

Bone artifacts discovered in Tanzania push back the earliest known date of bone tool technology by over a million years. In Olduvai Gorge, archaeologists have discovered a range of bone tools thought ...

The oldest collection of mass-produced prehistoric bone tools reveal that human ancestors were likely capable of more advanced abstract reasoning one million years earlier than thought ...

The findings come from a study of bone tools discovered at Olduvai Gorge in Tanzania and dated to around 1.5 million years ago. The discovery joins other finds — such as a 1.4-million-year-old ...

A fossilized bone tool discovered in Olduvai Gorge has an irregular and sharp surface. (Image credit: CSIC) The researchers were further able to narrow down the species of animals used to make the ...