Australia Is The Most Isolated Continent.

Eurasia Ended Up With The Most Domesticated Animal Species In Part Because It's The World's Largest Land Mass And Offered The Most Wild Species To Begin With.

The Anasazi Did Manage To Construct In Stone The Largest And Tallest Buildings Erected In North America Until The Chicago Steel Girder Skyscrapers Of The 1880s.

Why Did Human Development Proceed At Such Different Rates On Different Continents For The Last 13,000 Years?

Think Of All The Human Suffering Caused By The Sad Truth That Beautiful Sexy Women Or Handsome Porsche-owning Men Often Prove To Have Miserable Genes For Other Traits

Bird Taxonomy Is A Difficult Field Because Of The Severe Anatomical Constraints Imposed By Flight. There Are Only So Many Ways To Design A Bird Capable, Say, Of Catching Insects In Mid-air, With The Result That Birds Of Similar Habitats Tend To Have Very Similar Anatomies, Whatever Their Ancestry. For Example, American Vultures Look And Behave Much Like Old World Vultures, But Biologists Have Come To Realize That The Former Are Related To Storks, The Latter To Hawks, And That Their Resemblances Result From Their Common Lifestyle.