Brooke Greenberg is 17 years old right now.
And she still looks like a toddler.
The strangest thing is that she has never been diagnosed with any known genetic syndrome or chromosomal abnormality that would help explain why.
Her brain isn't developing either.
Just see photos of Brooke through the years.
1 year old
3 years old
7 years old
8 years old
12 years old
13 years old
16 years old