This landscape of blue, red, and gold is a cross section through a developing human bone. Human bones have a hard outer layer made of condensed bone and a softer inner core of spongy bone. This ...

Professor Huaijun Zhou from the Department of Animal Science (Jael Mackendorf/UC Davis) Keel bone damage, such as deviations or fractures in a bird’s breastbone, is a prevalent problem among ...

“Onion skin,” which doctors call lamellated periosteal reaction, occurs when multiple layers of bone form in a concentric circle around the outer surface of the bone. It can occur with Ewing sarcoma.