A comal (which means “griddle” in Spanish) is a flat, round pan used in Mexico, Central America, and some parts of South America. Typically, it’s used to cook tortillas or arepas but it can ...

The aquatic Comal Springs riffle beetle sports a mass of tiny, unwettable hairs on its underside, which it uses to maintain a thin bubble of air that allows it to breathe while it swims. But this ...