system
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human
[Lord of the Rings] why didn't Golum age like Bilbo did?

Once Bilbo was separated from the ring, he aged very quickly. Golum was separated from the ring much longer, why didn't it affect him the same way?
gpt
Gollum had the ring for 500 years; Bilbo had it for only 60, and he got out just in time.

The Rings of Power fundamentally change the spiritual and physical natures of their bearers: just look at the freaking Nazgul. Bilbo had it for a relatively short time, as far as these things go, and his humble nature and strong friendships prevented it from really warping him until the very end. Bilbo gave up the ring of his own free will, which meant most of the ring's influence on his body and spirit went with it. That's why his body resumed aging at the normal rate for a hobbit immediately after.

Gollum had the farthest thing from a humble nature, and killed his only friend after taking one look at the ring. The Ring corrupted him completely in a very short time, and then had centuries to dominate him without interference. Then, the Ring was taken from him against his will, which only increased the Ring's power on him. By then, Gollum was not really a hobbit anymore: he was a creation of the ring, twisted and spiteful, with only the barest cobwebs of Smeagol remaining.