Very nice museum. Typically very busy on weekends ...

Very nice museum. Typically very busy on weekends and holidays. If possible visit during the week. They have special exhibitions that cost a lot extra but they are usually very very good and worth the extra large cost. Entry tickets are for a specific time but you can stay as long as you want. NO re-entry! Dinosaur exhibition is very interesting, educational and impressive, it spans a whole floor of the museum. Also the smaller exhibition about earth on the ground floor is incredible, interesting, educational and well made. See there many real They Came From Outer Space including one that fell and hit a car in nearby Peekskill New York.