The science of us...

I pass on this clip from the Oct. 8 issue of Science Magazine, struck by the verse that brings home the fact that most of the cells in our body are 'foreign' bacteria:

They Said It

What am I in truth?
What am I in reality,
When only one in 10 of my cells
Is genetically humanity?

—From "Bacteria," one of the 20-odd songs celebrating the universe on scales from angstroms to astronomical units in "Powers of Ten," a choral work by composer David Haines. More than 200 singers from the Washington, D.C., area are set to perform the work on 10 October at the University of Maryland, College Park, kicking off the first inaugural USA Science & Engineering Festival. See

www.usasciencefestival.org.