Earth Day is held on April 22 with this year’s being the 55th anniversary of the first in 1970. It began during a time of great public protest in this country due to the Vietnam War, the Nixon ...

Four years after Voyager 1 captured the famous “Pale Blue Dot,” Sagan wrote a book with the same title, best known for its haunting prologue. His words are just as powerful in 2024 ...

Related: Earth from space — Incredible images of our planet from above Writing in his book Pale Blue Dot (1994), Sagan's famous description of the image is just as relevant and powerful today as ...