Birds-of-paradise are sending secret colour signals invisible to human eyes, scientists say
Many types of birds — such as hummingbirds, peacocks and parrots — are vividly colorful, but birds-of-paradise are especially ...
PBS14 年
Bird Brain
Both views are also set against views of the human brain then and now. Edinger's vision of a bird's neuroanatomy was widely held until about 30 years ago. Studies of brain chemicals and neural ...