Calcium sulfate an unusual property: when mixed with water at normal (ambient) temperatures, it quickly reverts chemically to the preferred dihydrate form, while physically "setting" to form a rigid and relatively strong gypsum crystal lattice: This reaction is exothermic and is responsible for the ease with which gypsum can be cast into various shapes including sheets (for drywall), sticks (for blackboard chalk), and molds (to immobilize broken bones, or for metal casting). Mixed with polymers, it has been used as a bone repair cement. Small amounts of calcined gypsum are added to earth to create strong structures directly from cast earth, an
What Planet Are You From? critics, currently holding a 42% score on Rotten Tomatoes based on 77 reviews, with an average rating of 5/10. The site's consensus states: "Though "What Planet Are You From?" has some laughs, it's too inconsistent and bland for critics to give it their recommendations." Metacritic reports a 41 out of 100 rating based on 32 critics, indicating "mixed or average reviews". What Planet Are You From? What Planet Are You From? is a 2000 American science fiction comedy film directed by Mike Nichols and written by Michael Leeson, Garry Shandling, Ed Solomon, and Peter Tolan based on a story by