This time of year there is a routine of measuring anthropogenic seismic events in Seattle. Another home field advantage appears to be episodic negative gravity waves.
The Monthly Fern??—Prairie Spikemoss
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*Selaginella densa*—moss, fern, fern ally, or none of the above? Coin is 19
mm across.This month the South Dakota fern series features another oddity—a
s...
4 days ago
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