The calcitic layers of the eggshells of archosaurs (including crocodilians and birds) and turtles are composed of distinctive ...

Centromeres, specialized regions located at the center of chromosomes, are critical for ensuring proper cell division. During ...

Facial plastic surgeons always seek to minimize the appearance of scars, working to hide incisions in the natural folds of the ear anatomy. Any visual scars will eventually heal and appear as thin ...

Fake or polite smiles, on the other hand, usually involve only the mouth muscles. The eyes remain wide or indifferent, and ...