Add Yahoo as a preferred source to see more of our stories on Google. Earth partially illuminated, displaying continents and clouds, floating in dark space scattered with distant stars. …and sometimes ...

Earth Day started in 1970 when people — including Wisconsin Sen. Gaylord Nelson — brought attention to the impact oil spills, pollution and smog were having on the planet. "Then in January 1969, he ...

Earth is about to get a new neighbor in the form of an asteroid. But this one won’t be making an impact. Instead, it’ll be what space enthusiasts have dubbed a mini-moon, and it will stick around to ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Earth is about to ...

Earth’s tilt recently made headlines when scientists revealed it had deviated 31.5 inches. That data came from a June study, published in the journal Geophysical Research Letters, that found human ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Deep inside Earth ...

Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars. Scientists call this difference crucial to ...

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Researchers have made a new discovery that changes our understanding of Earth's early geological history, challenging beliefs about how our continents formed and when plate tectonics began. A study ...

There's a particular kind of silence that seems to follow astronauts when they try to describe looking back at Earth. They're trained scientists and engineers, people accustomed to precision. Yet ...

Our planet has experienced dramatic climate shifts throughout its history, oscillating between freezing "icehouse" periods and warm "greenhouse" states. Scientists have long linked these climate ...