Juvenile eels break down bone tissue and rebuild it in preparation for mating.

The fabella disappeared from our lineage millions of years ago, but over the last century, its presence in people’s knees has become more common.

They hope to develop the “exercise hormone” into therapeutics that harness the benefits of exercise for people unable to do so.

Researchers recovered the cells that give rise to bone and cartilage from fetal and adult bone marrow and also derived them from induced pluripotent stem cells.

Ultrasound-stimulated microbubbles enable gene delivery to fix fractures.

The new technique helped pig tibias heal in just eight weeks.

Artificial bones produce new blood cells in mice, obviating the need for irradiation to kill off resident hematopoietic stem cells in recipients.

CLARITY made mouse bones transparent while preserving fluorescent labels so researchers could visualize tagged osteoprogenitors.

The world’s largest dinosaurs were born with adult-like proportions, possibly allowing them independence at a younger age, scientists show.