You had me until the bit about disappearing photos - that's not an innovation, anybody who has wanted to has always been able to make photos disappear after sen

You had me until the bit about disappearing photos - that's not an innovation, anybody who has wanted to has always been able to make photos disappear after sending. It's a bit of a false equivalence to mention a twist on sending someone a photo in the same sentence as you mention such great research efforts as number theory and bacterial immunology.