Some math problems are as old as the wind, experts say and many remain truly unsolved. But a new open source-based site from the American Institute of Mathematics (AIM) looks to help track work done and solve long-standing and difficult math problems.
NASA said today its AIM satellite has provided the first global-scale, full-season view of iridescent polar clouds that form 50 miles above Earth's surface known as "Night-Shining" clouds.
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