Left femur of extinct elephant, Alaska, Ice Age
Disease has a very long history on Earth. From an extinct species of elephant – possibly a mammoth – this long leg bone measuring just under a metre shows two bone cysts. The bone dates from the Pleistocene Ice Age (11,500 to 1.8 million years ago). The bone was originally in the collection of Roy Moodie (1880-1934), an American paleopathologist who studied prehistoric disease.
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An enclosed sac that is filled with liquid or semi-solid matter.
The very hard and dense connective tissues that join to form the skeleton. Made of collagen fibres and bone salts.
The thigh bone. It is the longest bone in the human body.