"There's no one perfect or best way to measure biological age," Koelsch says. "I like to think of it as like having a car.

The I Love You test fail is a hilarious moment you can�t miss! House Democrat who confronted Johnson: Trump ‘incoherent’ at ...

I am 32 years old. At least that's what my birth certificate tells me. But if you asked me about my "biological age" – you know, the scientific measurement of my age based on fancy algorithms – I'm 27 ...