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Experts say it’s likely space junk—and there’s plenty more where that came from.

Although mammals may be the dominant form of life today, we’re relative newcomers on planet Earth. Here’s our place in natural history.

If there’s life lurking on the moons of Saturn and Jupiter, could our instruments even detect it?

From anger to awe: How one woman overcame “debilitating trauma” to conquer a near-impossible 53-hour swim at 64.

Frozen adversity set the stage for an explosion of diversity.

Contrary to conventional wisdom, matter can escape the center of the Earth.

On a cosmic scale, our existence seems insignificant and inconsequential. But from another perspective, humans are completely remarkable.

The primary causes of global climate change are all due to human activity. Adding aerosols to our atmosphere only exacerbates the problem.

The outer planets’ clouds hide the weirdness within.

Passing chunks of ice can fertilize ocean waters and play a role in the planet’s carbon cycle.

Five new places scientists have uncovered plastics.

The divers spend their waking hours either under hundreds of feet of water on the ocean floor or squeezed into an area the size of a restaurant booth.

Embark on a journey through one of the most profound ecological transitions in the history of complex life.

“Amid the chaos, he remembered his life being eerily calm as he knew it wasn’t if, but when they would be hacked to pieces. He just kept kicking.”

Scientists still aren’t sure how they perform without those restorative Z’s.

They’re in our brains, hearts, and blood — but what are they doing to us?

To this day, one cult believes that Lemuria was real, and that its people left us the sacred wisdom to revive their advanced civilization.

An un-crewed sailing drone discovered the unusually shaped, slumbering seamount.

The cycles of life all rely on the dynamism of the Earth’s crust.

Scuba divers often appear to be swimming through a calm and muffled universe. This couldn’t be farther from the truth.

Step back from the AI maelstrom and explore Lem’s “Summa Technologiae” for a detached look at technology’s role in human evolution.

Environmental progress is happening quickly but we must keep pushing for change.

Despite billions of years of life on Earth, humans first arose only ~300,000 years ago. It took all that time to make our arrival possible.

The fear of deep bodies of water may be evolutionarily ingrained.

Some microbes can withstand Earth’s most inhospitable corners, hinting that life may be able to survive similarly extreme conditions on other worlds.

Our cosmic home, planet Earth, has been through a lot over the past 4.5 billion years. Here are some of its most spectacular changes

Looking back on our planet’s early history offers a new (and less crazy) meaning for the idea of a “flat Earth.”

Many countries just ship their plastic waste overseas.

For centuries, the only way to travel between the Old and New World was through ships like the RMS Lusitania. Experiences varied wildly depending on your income.

Mercury, Venus, and Mars are all uni-plate planets, and may always have been. Here’s what’s known about why Earth, uniquely, has plate tectonics.