The New Mexico Museum of Natural History & Science (1801 Mountain Rd. NW) celebrates the 50th anniversary of the Apollo 11 moon landing this Saturday, July 20, with a screening of the Smithsonian Channel documentary “The Day We Walked on the Moon.” The program uses spectacular historical footage and interviews with key figures to tell the story of how mankind walked on the Moon. The film starts screening at 10am in the museum’s STEM Lecture Hall and runs continuously throughout the day. Admission to the screening is free with museum admission. Moon-related table activities for kids will also be available from 10am to 2pm.