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DNA - Deoxyribonucleic Acid
Kilo is one thousand. Mega is one million. Giga is one billion. Tera
is one trillion. Peta is a thousand trillion (one quadrillion). Exa is
a thousand peta (quintillion). Zetta is a thousand exa (one
sextillion). Yotta is a thousand zetta (one septillion).
Juan Enriquez quotes a study by the University of California at
Berkeley in his tome, "As the Future Catches You - How Genomics and
Other Forces Are Changing Your Life, Your Work, Your Investments, Your
World":
All the words ever spoken by humans amount to 5 exabytes. By
comparison, we now produce 1.5 exabytes of data per year, including
phone conversations, e-mail messages and photocopies.
The genetic code consists of three billion letters, repeated twice
within each of our 50 trillion cells. This amounts to 15 with 22 zeros
after it, or 150 zettabits of data. Stretched in a line, the DNA is
one cell would measure c. 2 meters long. Inside the cell, it is folded
in a packet merely trillionths of a centimeter long.
http://www.theharrowgroup.com/articles/20021216/20021216.
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