Acceleration: How We Grow Up Faster!

Imagine if you could grow taller super fast, like a superhero! Well, something like that is happening to people all over the world. It's called acceleration, and it means kids and grown-ups are getting taller and reaching important life stages, like becoming adults, much quicker than they used to. It’s like everyone got a secret growth spurt that’s lasting for a long, long time!

A long time ago, like when your great-great-grandparents were kids, people didn't grow as tall. And girls became adults much later. But over the years, things changed! It’s like going from a slow snail to a speedy race car. In just 100 years, people started growing taller by a whole lot, and girls started reaching womanhood much sooner. It’s a big change!

This amazing growth spurt is like a big thumbs-up for how well people are living! When people have enough healthy food to eat and live in clean places, their bodies can grow their very best. It means that, on average, people are healthier now than they were in the past. It’s like giving your body the best tools to build itself strong and tall!

Think about how much taller a baby grows in their first year. Acceleration is like that, but for whole groups of people over many, many years! For example, in Europe, people grew about as tall as a school bus is long, compared to people from 100 years ago! And girls started their first period, called menarche, much younger. It’s a sign of a healthier world!