Hello, The Museum is free to L.A. residents 3-5pm daily with proof of billing address. Additionally, we have other free days and offers for CA EBT card holders. You can learn more at our official site: https://nhm.org/plan-your-visit
That is true we went yesterday Tuesday and the permanent and temporary exhibition are free but not 3D cinema. From there for the other days normal prices with student / military discounts etc.
They say that the free days are Tuesdays, the truth is that I haven't gone that day but you can talk to make sure
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