I just watched Alien and when the alien leaves the host it is tiny.

A few minutes later in the movie they encounter the alien and it's now fully grown and is larger than a human.

I don't know how much time actually goes by in the movie but it couldn't be more then a few hours, it seems to grow extremely fast. How fast does it actually grow?


According to the Alien Wiki "Maturity is reached in a few hours, and involves a dozenfold increase in mass..."

Given that it takes only a few hours to go from being face hugged to having one burst out of your chest, it looks like they can go from embryo to adult in only 6-8 hours.

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