Thigh bone adds to mystery over 14,000-year-old Homo species
Leg fossil from Chinese cave raises controversial possibility of hybrid humans
![bones from Red Deer Cave](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/12/121615_bb_cavebones_free.jpg?fit=860%2C460&ssl=1)
THIGH PUZZLER A newly described upper leg bone, shown here from two angles, from China’s Red Deer Cave (entrance shown, right) raises the controversial possibility that a now-extinct Homo species interbred with Homo sapiens, represented by these skull, jaw and tooth fossils from the same cave.
D. Curnoe and Ji Xueping