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Hayadan > Cicadas

Cicadas

Once every 13 years

Lotem Eliyahu
August 7, 2011
31 תגובות

The cycle of cicadas for 2004 is over - they will return in 2021

The knowledge site system
July 13, 2004
No comments

The attack of the cicadas, now in the USA - why exactly every 17 years?/Aryeh Seter

Aryeh Seter
May 19, 2004
No comments

Astronomical biological clocks

Haim Mazar
January 1, 1999
One response