向人体提出问题~
hints:
puberty
只听写正文~

A new challenge has been met with a new answer. Our bodies too face different challenges in life. And we are reworked to cope with each of them. From the moment we are born, we are changing and adapting to life's demands. And every change we make follows a plan drawn up for us by the millions of generations that have gone before. In this series, I'm going to show you the stunning science of these changes throughout life.
How our brain cells are wired up when we are children? How hormones transform us at puberty? What changes happen inside our bodies? How our muscles become stronger? How our brains mature as adults? And how our bodies continue to alter throughout our lives.

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