Eurohippus Messelensis

A 48-million-year-old fossil of a pregnant horse and fetus is the oldest of its kind known to science and contains unusually well-preserved evidence of tissue from the womb, researchers said Wednesday.

A 48-million-year-old fossil of a pregnant horse and fetus is the oldest of its kind known to science and contains unusually well-preserved evidence of tissue from the womb, researchers said Wednesday.