Did males get bigger or females smaller?
Don’t just say he’s bigger. When it comes to bird species with jumbo-size males, we may have to rethink evolutionary history and say that in some cases the female’s smaller, according to Chicago researchers.
Don’t just say he’s bigger. When it comes to bird species with jumbo-size males, we may have to rethink evolutionary history and say that in some cases the female’s smaller, according to Chicago researchers.