CBS News Chicago's Marie Saavedra was very brave, taking a tour of the collections visitors don't normally see at the Field Museum of Natural History, getting a behind-the-scenes look at things ...

The museum's opening was delayed until noon Tuesday because of the threat, but it was open as usual through the afternoon.

Chicago Field Museum is a world-class institution, but it almost never existed. Learn the story behind this iconic attraction, plus details on visiting today.

which include admissions to the museum. The Chicago CityPASS also covers access to a 3D film. The Field Museum is open daily from 9 a.m. to 5 p.m., but no visitors are admitted after 4 p.m. The ...