This stone was no gem. Doctors in Lebanon found an incredibly rare vagina stone — the size of an orange — lodged in a woman’s pelvis. A recent case study published in Urology Case Reports detailed the ...

All vertebrate species have a pelvis, but only humans use it for upright, two-legged walking. The evolution of the human pelvis, and our two-legged gait, dates back 5 million years, but the precise ...

A common idea in evolutionary biology comes under new scrutiny with help from a big medical dataset and AI. Certain genes in a mother determine both her birth canal size and her baby’s head size at ...