Welcome to Curiosity Daily from Discovery The Best Place in the World to get smarter in just a few quick minutes.

I'm Nate.

Guys, it's so good to have you here with us today.

I'm Callie, and this is Curiosity.

Today, you'll learn about how our perception of when old age hits is changing,

a baby's response to a happy face, and the housekeeping habits of Neanderthals.

Let's learn some stuff today.

There have been so many studies on aging that it's probably impossible to count them all

let alone coordinate all their data there are studies that look at how our cells

age how our genetic traits affect our rate of aging how environmental factors make certain organs

age faster than others, just endless. But a new study is looking at aging from a

new angle. At what age do we think old age begins?

Huh, okay, so this is more about perception than actual aging.

Right.

And the findings are pretty interesting.

It turns out our perception of when old age starts is trending upward.

I mean that's not really a surprise. I mean we're living longer, we're retiring later.

I know it's a subjective measure, but maybe we're actually objectively getting older later.

Well that could be but this study actually goes even deeper than that. Let me explain.

So the study is based on data from a project called the German Aging Survey, which tracked responses from people

born between 1911 and 1974.

Participants were asked, at what age would you describe someone as old?

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