An Operation Smile volunteer reverses an oxygen mask so a child with a cleft condition can blow a bubble for the first time in Guadalajara, Mexico. (Operation Smile Photos)
Photo credit: By André Karwath/Wikimedia Commons & Canva – An experiment running since 1954 has taught scientists valuable information about how evolution really works.
Photo credit: LeVar Burton/X (via Finding Your Roots/PBS) – James Henry Dixon was a North Carolina farmer with a wife and children when he fathered Burton's great-grandmother.
