And it's my brother Matt, the guy I had tortured so much as a child. And his smile is so big. I can't see the little boy in him anymore. And I follow him onto my next dive, and onto many others ...

Michael, the second youngest son, was born in 1958, but there were already many brothers and sisters ahead of him. The oldest of the Jackson siblings is Rebbie Jackson, born in 1950, followed by ...

The Science of Siblings is a new series exploring the ways our siblings can influence us, from our money and our mental health all the way down to our very molecules. We'll be sharing these ...