Know how to adopt Earth with NASA’s Adopt The Planet initiative to celebrate Earth Day 2017.
April 22, celebrated as Earth Day, saw various events that were held to mark the day.
A mini-moon was seen on Earth Day -- the rare full moon appears 14% smaller than usual.
In honor of Earth Day 2013, Google rolled out a new doodle which pictures scenic shots of a mountain and a lake that's home to a school of fish.
