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2016-3-1 UPDATE
Firefly
The secret is in its flashing light
It is well known that the Japanese firefly glows at 4 second intervals in eastern Japan, and 2 second intervals in western Japan. The boundary for this is almost perfectly aligned with Fossa Magna, and there are even reports of 3 second intervals in this vicinity. Why does the same species have different light emission intervals? [4’37″/Subtitles: Japanese, English]
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