Life on Earth is tough as nails.

From the crushing, soulless depths of the ocean to the highest reaches of the atmosphere, from boiling hot springs to Antarctic wastes — even in the radioactive heart of Chernobyl, life thrives. It finds a way. It laughs in the face of adversity.

Turns out, that amazing tenacity is kind of our birthright as Earthlings. To understand why, you've got to go back to Snowball Earth.

Saturn's moon Enceladus. 720 million years ago, Earth's surface might have looked strikingly similar. Photo from NASA/JPL-Caltech/Space Science Institute.

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If you follow "Game of Thrones," you know some scenes call for some pretty remote — not to mention freezing — locations.

I know, Jon Snow. I know. GIF via "Game of Thrones."

They look pretty majestic on screen, but one ice-cold location in particular looks even cooler in real life.

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Natasha Rossi believed she had the perfect life.

She had two awesome kids — two and a half-year-old identical twins — and the love and support of her boyfriend, Desi. Life, she thought, could only get better.

All photos via Upworthy/Walgreens.

Then, in January 2019, she was hit with some of the hardest news that anyone can hear.

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