It's a simple fact that puppies have brought people of all backgrounds together, causing the world to stop and collectively let out a high-pitched "aww!"
Photographer Seth Casteel captured some cute moments for his recently released book, Underwater Puppies, a sequel to his highly successful original book, Underwater Dogs.
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Dog lovers can rest assured that the submerged puppies in this series were practicing their swimming skills when Casteel took these shots during swim lessons, where more than 1,500 pups have built their confidence while getting a bit of exercise.
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