have a fourth. This means they can also seeultraviolet(紫外线) colors. The ultraviolet cone type allows birds to see combination colors that humans can’t, like ultraviolet green and ultraviolet red. Biologists studying birds have supposed that birds can see these, but it’s been challenging to...
re: #116 Wendell Zurkowitz ((slave to the waffle light)) They all have a black friend somewhere… Having come from farm country in Illinois and Indiana one thing that surprised me when I lived near Richmond, VA was the existence of Black-owned farms. They simple don’t exis...