Carl Zimmer Explores The Weird Lives Of Viruses  In his book A
Planet of Viruses, science writer Carl Zimmer catalogs a
menagerie of viruses, from the bacteriophages that prey on
ocean-dwelling microbes to those which infect humans, such as
smallpox, HIV and the papillomaviruses behind cervical cancer
and the common wart.    You're listening to SCIENCE FRIDAY. I'm
Ira Flatow.  Got a little bit of astounding trivia for you
tonight. It's a Friday night. You want to really knock the socks
off some people you're talking to, you know? I'm going to give
you a little quiz first. What has a tiny shell, it's invisible
to the naked eye, it affects the Earth's climate and causes
cancer? It's a virus.  They've learned to live pretty much
anywhere in the world and to use nearly any living thing for a
host. And here is the astounding statistic: Viruses kill half
the bacteria in the ocean every day. Every day, viruses kill
half the bacteria in the ocean. And they invade a microbe host
10 trillion times a second around the w