born 1950 40 → 700 known sites about 18× as many as when you were born.
method Diaz & Rosenberg 2008 counts by decade; Breitburg et al. 2018 for recent totals.
the sources behind every line, the range and the weakness, the worked examples, the live embed and its code, and the dispute line are for people who sign in. an email address, no password, one link. continue →