Everyone loses their youthful glow eventually, as the process of aging drags on. But while age is the single most unifying quality of humans, it's also a multifaceted and complex phenomenon, leaving scientists baffled for centuries — with many wondering whether a unifying causal mechanism underlies aging, or if it's caused by a composite result of several disparate factors.

However, scientists recently found that DNA damage is responsible for most — if not all — features of aging, which hints at the possibility of a unifying cause behind the way time drags us down, according to a recent study published in the journal Nature.

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