"That's a complicated question. It depends on what you consider to be being alive. If you mean my consciousness and thought processes, my brain has been functioning for just shy of 3739 years, but I was petrified for 3719 years, minus nine weeks. So if you're looking for something more attuned to how my physical body has aged, I'm nearly twenty." Senku offered, doing his best to explain the circumstances of his age.

He didn't expand on it, although it was an amusing story, but he's very much more interested in the balloon.

"And yet it is the cutting edge of technology at the moment! Never let it be said that studying the history of anything is a waste of time." Those were words of wisdom, truly.