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10 Things in Nature That Are Not the Color You'd Expect

Blue lava? A blood-red waterfall? The natural world is full of surprises. If you think you've finally figured out Mother Nature, think again.<p>Blue lava? A blood-red waterfall? The natural world is full of surprises. If you think you've finally figured out Mother Nature, think again.

Nature

Surgeons Discover Quirky Knee Ligament All Over Again

About 150 years ago, a prestigious surgeon in Paris found a new body part while dissecting cadavers. He described the structure as a pearly, "fibrous band" on the outside of the bones in the knee.<p>That sure sounds like a ligament. But nobody really gave it much thought. And poof! Over the next …