CBS News A look inside London's Natural History Museum, still closed due to the pandemic The world's museums have been resembling scenes from the 2006 comedy movie "Night at the Museum." They've been quiet, empty and vacant. Visitors are nowhere to be found, with an estimated 90% of museums closed due to COVID-19. That includes the Natural History Museum in London. On a typical day, 15,000 people visit the museum, but now, a skeleton staff of just 20 people walk its halls. The exhibits may be in hibernation but conservator, Claire Kelly, is as busy as ever hunting down the biggest threat to the museum: moths.