DreamWithMe filter: What if everyone read science fiction? How would the world be different? [more inside]
posted by amtho on Apr 7, 2006 - 27 answers

If there's anyone here who groks physics and math and astronomy and astrophysics here's a great big what-if for you. [more inside]
posted by Grod on Jan 25, 2006 - 14 answers

What if most people were born blind, and seeing was rare? [more inside]
posted by goodnewsfortheinsane on May 27, 2005 - 43 answers