Long before DNA unraveled the double helix of life, scientists were already tinkering with its inheritance. The idea that traits could be passed from one generation to the next fascinated early ...

Why are there big dogs like Great Danes and small dogs like Toy Poodles? Find out! Not all animal adaptations are because of a natural process. We have hundreds of different breeds of dogs because of ...

Through intensive breeding, humans have pushed breeds such as pug dogs and Persian cats to evolve with very similar skulls and "smushed" faces, so they're more similar to each other than they are to ...