Home > Topic > about five billion
1 " a typical chromosomal DNA molecule in a human being is composed of about five billion pairs of nucleotides… But since there are four different kinds of nucleotides, the number of bits of information in DNA is four times the number of nucleotide pairs. Thus if a single chromosome has five billion (5 X 10^9) nucleotides, it contains twenty billion (2 X 10^10) bits of information… We also see that if more than some tens of billions (several times 10^10) of bits of information are necessary for human survival, extragenetic systems will have to provide them: the rate of development of genetic systems is so slow that no source of such additional biological information can be sought in the DNA. "
― Carl Sagan , Dragons of Eden: Speculations on the Evolution of Human Intelligence
2 " Eric Schmidt likes to point out that if you recorded all human communication from the dawn of time to 2003, it takes up about five billion gigabytes of storage space. Now were creating that much data every two days "
― Eli Pariser , The Filter Bubble: What the Internet is Hiding From You
