Earth Day began as a protest in 1970, but its meaning has evolved. Here’s how it changed - and what it represents today.

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Earth Day 2026 is the largest civic observance on the planet. Yet few organizations mark it. Here are four actions to take ...

How much do you know about our planet? Here are the amazing, odd and downright cool Earth facts scientists learned in the ...

Add Yahoo as a preferred source to see more of our stories on Google. No, Earth will not have "two moons until 2083," but asteroid 2025 PN7 has joined Earth's orbital path, with the tiny fleet of ...

The recently spotted asteroid 2025 PN7 appears to be the source of the rumor mill about Earth's supposed second moon. Earth has several quasi-moons that get their name due to the fact that they ...

Each year, Earth Day brings together millions of people across the globe to celebrate environmental achievements and continue to champion environmental stewardship. This year, the celebration — now in ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

Proto-Earth is the term used to describe the earliest days of our planet, the body from which our pale blue dot evolved. At this stage of its geological evolution, it likely existed only for a ...