Читать книгу The Handy Dinosaur Answer Book - Patricia Barnes-Svarney - Страница 80
How do the number of known dinosaur species compare to some modern species?
ОглавлениеEven if there are truly 700 valid dinosaur species, the number is still less than one-tenth the number of currently known bird species; less than one-fifth the number of known mammal species; and less than one-third the number of known spider species.
