Earth Day: Planet Isn't as Round as You Think And other fun facts and freebies on the 46th celebration of our 'greenest' holiday By Jenn Gidman, Newser Staff Posted Apr 22, 2016 12:50 PM CDT 28 comments Comments Cheers to Mother Earth. (Shutterstock) (Newser) – Friday marks the 46th celebration of Earth Day, and there's no lack of commemorative trivia, deals, and think pieces honoring Mother Nature and the environment. Here, a roundup of our favorites: No, the Earth's not flat, but it's not exactly perfectly round, either. Discovery.com explains that, and 6 other surprising facts about our planet. Starting with 1970's "Environmental Magna Carta," National Geographic lists 46 milestones that have taken place since the first Earth Day. CNN explains why, despite "melting ice sheets, intensifying heat waves … [and] dying elephants," we're not completely doomed. Some Earth Day deals from around the Web via ABC7, including a big Best Buy sale on energy-efficient appliances. Fusion reveals why this Earth Day is different from all past Earth Days. Point: why more than 130 countries signing the Paris climate agreement at the UN Friday is a bad idea, per the Federalist. Counterpoint: why it's a "genuinely good" idea, according to Mother Jones. The Christian Science Monitor gets philosophical and wonders: Do people even care about Earth Day anymore? Check out which celebrities have been deemed the "greenest" stars in the past.