Binary digits radioed at star cluster 25,000 light years away; contained semiprime #, atomic #s of hydrogen, carbon, nitron, oxygen, & phosphorus (DNA's elements), other DNA-related data, graphics of human, solar system, Arecibo telescope...
This tree is constructed from an analysis of small subunit rRNA sequences sampled from approximately 3,000 species from throughout the Tree of Life. The species were chosen based on their availability, but most of the major taxonomic groups were included,