Six-year-old Johanna Gill puts a protective hand on her sister, Eva. The twins both have mild autism, a disorder linked to genetic inheritance.
A Thing or Two About Twins
They have the same piercing eyes. The same color hair. One may be shy, while the other loves meeting new people. Discovering why identical twins differ—despite having the same DNA—could reveal a great deal about all of us.
Photographs by Martin Schoeller