A billion??  10^9..........like 19.......like 90 degrees..............one fourth the c plane.......like there is only one prime in the 90s........97.........9 * 7 = 63.............like 360........backwards..............................spin...................................humans.......from scratch.......

Human DNA is packaged into physically separate units called chromosomes. ... The human genome is thus said to contain 3 billion nucleotide pairs, even though most human cells contain 6 billion nucleotide pairs. DNA is a double helix: Each nucleotide on a strand of DNA has a complementary nucleotide on the other strand.

Introduction - Mapping and Sequencing the Human Genome ...

https://www.ncbi.nlm.nih.gov › books › NBK218247