“One hemisphere of the globe is illuminated by the sunlight while the other remains in darkness.”

“The wind chill, however, is affecting some captive birds from the southern hemisphere which can have icicles forming on their beaks.”

“The winter solstice is the day the earth's tilt gives the southern hemisphere the least sunlight, making it the shortest day of the year.”

“The zero degree line of longitude slices down through Greenwich, dividing London into western and eastern hemispheres.”

“Thus, Libra is Libra because it comes in the autumn equinox, when the Sun spreads its light equally over both hemispheres.”

“The brain weighed 1620 g, and macroscopic examination revealed congested leptomeninges covering the cerebral hemispheres.”