Earth & Nature
Why is some Antarctic ice deep blue instead of white?
White snow returns light quickly. Dense, relatively bubble-free ice lets light travel farther, making its selective absorption easier to see.
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Earth & Nature
Start with a scene. Leave with an explanation.
Earth & Nature
Why does a lava lake rise and fall like a piston?
A moving lava surface does not always mean new magma has surged in. Gas collecting near the surface can lift it, then escape.