The Natural History Museum in London, England has some 80 million objects, which date as far back as 4.5 billion years. They have over 300 scientists and recently reported publishing 700 papers in conjunction with others outside the UK. The museum first opened 18 April 1881. It's origins date to 1753 and the collection of Sir Hans Sloane purchased by Parliament.
What I recall from decades ago is the impressive great entrance hall (Hintze Hall). The impressive blue whale skeleton is 25.2 metres long.
I expected to see dinosaur skeletons and was impressed by the animation--wishing my grandchildren could enjoy the presentation too. See the clip below from YouTube.
American Museum of Natural History, NYC
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