11.   Their brains are still developing, They need rehabilitation, not punishment.

12.   Thus brains develop by pruning and sculpturing, not by building networks with billions of new cells, Rakic and others theorized.

13.   Young children quickly absorb the lead at a time when their brains are developing rapidly and can easily become poisoned.

14.   As the human brain develops through the teen years, new cells or neurons grow by forming extensions and making millions of tiny connections.