3 ms·But we're not interested in Earth, so we'd expect to see 16.999999999 other civilizations.by marshray 14y agoBut we're not interested in Earth, so we'd expect to see 16.999999999 other civilizations.mistercow 14y agoYes, but I think you may have a few too many sig figs there.marshray 14y agoSo does 17 :-)mistercow 14y agoI guess the number of sig figs when you write out "a billion" is ambiguous.