Dogs today come in a mind- blowing array of shapes and sizes, but when did this diversity in canine forms begin? New research ...

You don't find people the size of insects or giraffes; humans are all roughly the same size. The same is true of most species. There isn't a huge difference between the biggest and the smallest.

Source: SC Psychological Enterprises Ltd. The old saying goes that you can't judge a book by its cover, suggesting that first impressions based upon the look of something don't give you much ...

Smaller dogs may live twice as long life as their larger counterparts. But does this size difference also impact how dogs age in terms of behavior and cognitive abilities? Based on the data of 15,000 ...

Q: What are the typical stages of a dog's life from "puppyhood" and "teen" years to old age? And how do these stages differ from small breeds to larger ones? A: In general, we look at four stages for ...