HIV & AIDS

Scientists see an ultra-fast movement on surface of HIV virus

As the HIV virus glides up outside a human cell to dock and possibly inject its deadly cargo of genetic code, there's a spectacularly brief moment in which a tiny piece of its surface snaps open to begin the process of infection.

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Cello

The cello (plural cellos or celli — the c is pronounced [tʃ], as in the ch in "check", thus "chel-lo") is a bowed string instrument. The word derives from the Italian violoncello. A person who plays a cello is called a cellist. The cello is used as a solo instrument, in chamber music, and as a member of the string section of an orchestra. It is the second physically largest member of the violin family of musical instruments, next to the double bass.

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