New discoveries from the world's deepest caves continue to unlock secrets from extinct species and Neanderthals that once walked the Earth. From skeletal remains to ancient artwork, these pits left us with more questions than answers.

Discoveries from the World's Deepest Caves

Scientists Explain Fascinating Discoveries Found in the Deepest Caves

Born with two different colored eyes and a birthmark running down her center, Rachelle knew she was different. But as she grew older, chronic illness brought her to doctors' attention. What they discovered was one of the rarest conditions on Earth, as she was her own twin. 

Rachelle Is Her Own Twin

Meet Rachelle: A Woman With Enough DNA for Two

With Climate Change Effecting Water Sources, Survival of Sunflower Species is Coming into Question.

Climate Resilient Sunflowers are Becoming Endangered

Grow and Protect: Environmentally Resilient Sunflowers

From natural disasters to geopolitical unrest, some of the world's most unique buildings have stood empty for decades. We're taking a look at this eerie structures and their historical backstory.

Abandoned Buildings Around the World

29+ Abandoned Buildings From Around the World With Interesting Backstories

From inedible to delicious, here are America's fast-food chains ranked, according to critics. 

America's Fast-Food Chains Ranked

The Least Favored Fast-Food Chains in USA, Ranked

From military conflicts to natural disasters, some of these abandoned airports from around the world have quite the backstory. 

Abandoned Airports 

29+ Abandoned Airports that Tell a Fascinating Story

Large Low-Shear-Velocity Provinces have puzzled scientists for decades. Now, headway is being made on a new theory that opens up even more questions about how Earth was formed.

Continent-Sized Lumps Found Under Earth's Surface

Massive Lumps Found Under Earth’s Surface, Baffle Scientists

Way back in 1969, a plea from a concert MC inspired the most popular rock concert trend around: waving lighters in the air. Here's the backstory.

Here's Why We Wave Lighters At Concerts

The History Behind Lighters at Rock Concerts

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This isn't our average solar eclipse. Here's a look at the bizarre footage that's left scientists at NASA speechless.

NASA's Mars Rover Catches Solar Eclipse

“Potato-Shaped” Solar Eclipse Captured by NASA

From fleeing animals to red water, here are unique ways that Mother Nature warns that natural disasters and dangers are lurking.

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Eliza Gray