BEIJING, Dec. 4 (Xinhua) — A new study shows that the middle ear structure of modern mammals began to evolve as early as the Cretaceous period.
The mammalian middle ear is a classic example of progre
Enjoy life, Inspiring work
Enjoy life, Inspiring work
BEIJING, Dec. 4 (Xinhua) — A new study shows that the middle ear structure of modern mammals began to evolve as early as the Cretaceous period.
The mammalian middle ear is a classic example of progre