From the time a baby is born to its first birthday, what happens to the size of its brain?

A baby's brain will get 3 times bigger during its first year of life, and by the time the baby is 2 years old, its brain will already be 75% the size of an adult's. This is the result of rapid neural connections; by age 3 a child's brain is much more active than an adult's, making many more connections.

Asked by Tom Cohen · Last updated 5 years ago · 19K views