474.
The idea behind this one is the secret world each and every person carries inside, like it or not, a world that no-one else will ever be a part of. The title refers to the saddest thing I have ever read, on page 474 of the 1995 paperback edition of Black Holes and Time Warps, by Kip Thorne, in which a beautiful theory about baby universes is refuted.
Oil on cotton (approx 36" x 24")