Our brain is our most complex
organ. It’s a command centre for
everything we think, do and feel.
We’re born with almost all the brain
cells we’ll have throughout our lives,
so our brain doesn’t grow as much as
To do this, it needs neural
connections—billions of them. These
Our brain thrives on connections
Billions of synapses form in the early years
tiny, each about 10,000 times smaller
than the thickness of a piece of paper.
The basic architecture of the
brain is built over time, beginning
before birth and continuing until
we’re adults, with more connections
forming in our first six years than
at any other time in life. During our
early years, our brain makes about
700 new neural connections every
second—billions by the time we’re
three years old.
It’s no wonder toddlers are bursting
with life, energy and curiosity.
As we grow, our brain continues
to form new neural connections at
a slower rate. At the same time, our
brain also goes through synaptic
pruning, shutting down some circuits
that are not used so the remaining