Wednesday, October 7, 2026 Search

Great Lakes Ledger

Science, health, and the planet, explained.
Space

Aurora Lights: What Causes Them and Why the Colors Change

Aurora lights explained: how solar wind electrons hit oxygen and nitrogen to make green, red and purple, plus what the Kp index means for seeing them tonight.

Aurora Lights: What Causes Them and Why the Colors Change Space

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The water you drink, the science behind it.

One email a week. The freshwater research, health findings, and environmental data that matter across the basin, written so you can actually use them.