If you or your children are inspired by creatures from space, our next set of free coloring pages will have you soaring out of this world with excitement. These special alien focused sheets focus ...

But why is it important to know what colors extraterrestrial life might be, beyond being able to more accurately depict aliens in Hollywood? "We need to create a database for signs of life to make ...

Earth was once purple, not green! Early microbes used retinal, not chlorophyll, for photosynthesis, reflecting violet hues.