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have you, like me, always thought that pot of gold at the end of the rainbow was a story you only told to kids? well, wonder no more, because someone actually photographed the end of a rainbow in california (read here) & there's certainly no glitter in sight. 
i learned of the significance of rainbows at different times of my life....
when i was young, i was told never to point your finger at one, or it'll get chopped off (how, i don't know as i've never put that myth to the test)......
in primary school, i had to remember all 7 colours of the rainbow in its order....
in bible school, it was the sign that there will never be another Great Flood, the tsunami notwithstanding....
and then, Kermit the frog sang of the Rainbow Connection...
Whenever the rainbow appears in the clouds, I will see it and remember the everlasting covenant between God and all living creatures of every kind on the earth. Gen 9:16