There are always exceptions to the rule, but some tried-and-true methods have proven to be accurate in determining the size a ...

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.

Despite the huge variation in body size and shape, Great Danes and Chihuahuas are both members of the same species: Canis lupus familiaris. They retain the ability to breed with one another (allowing ...