Primate species with better color vision are not more likely to have red skin or fur coloration, as previously thought. It's long been assumed that primates' colorful skin and fur is linked to their ...

An adult black vulture (Coragyps atratus; left) and an adult turkey vulture (Cathartes aura; right). (Two photos merged.) The photos were taken about 10 minutes and one mile apart in Florida. (Credit: ...

Mars is easily identifiable in the night sky by its prominent red hue. Thanks to the fleet of spacecraft that have studied the planet over the last decades, we know that this red color is due to ...