Watching it never grows old.

Anthony Cerniello's aging simulation video (above) is blowing minds across the Web not only for its haunting effect -- but for his painstaking process to achieve it.

Cerniello used his friend Danielle as a model and turned her into a composite by combining photos of her relatives, young and old, who have the greatest facial resemblance, thisiscolossal.com reported. Then animators and a 3D specialist helped bring the subtle transitions to life.

"I attempted to create a person in order to emulate the aging process," Cerniello wrote on his Vimeo page. "The idea was that something is happening but you can't see it but you can feel it, like aging itself."

The five-minute video is "easily one of the best depictions of the aging process we've ever seen," culture blog io9.com wrote.

Earlier on HuffPost50:

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  • Age People Experience Their First Kiss: 15

  • Age People Say You Should Support Yourself Independently From Your Parents: 22

  • Age People Say You Should Stop Doubting Yourself: 39

  • Age People Say You Should Stop Having Kids: 41

  • Age People Say It's Time To Consider Marriage: 25

  • Age People Say They First Reminded Themselves Of Their Parents: 32

  • Age People Say They First Felt Their Age: 38

  • Age People Say They Feel Increasingly Prepared For Aging: 65

  • Age People Expect To Reach: 84

  • Female Celebrity Who Is Aging Gracefully: Betty White (84%)

  • Male Celebrity Who Is Aging Gracefully: George Clooney (79%)