Nature Done Wright

On Monday, I wrote:

Saw this egg in the national's capital recently. What is it?

(Sorry, I lacked a quarter to place next to it for scale, but it is the largest egg I have ever seen…)

Hint: I think it's from a movie…

Neil Maruca and Beth Goffe answered correctly, and Neil even provided a link:

https://www.smithsonianmag.com/smithsonian-institution/smithsonian-curator-reveals-new-details-on-an-egg-from-sigourney-weavers-iconic-alien-franchise-180981881/

The egg was a publicity prop from the Alien movie franchise. It's in the Smithsonian's National Museum of American History.