Earth Day: Planet Isn't as Round as You Think

Friday marks the 46^th 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. (More Earth Day stories.)