Jordy sent Sunday greetings with this photo of a rare male Northern Cardinal in his backyard. Time to reload the feeders.
Greeting cards, enlargements etc. contact Roland Jordahl. Blog reader discounts available.
The Hidden Math of Ocean Waves
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The math behind even the simplest ocean waves is notoriously uncooperative.
A team of Italian mathematicians has made major advances toward
understanding it.
4 hours ago
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