The change between futures and spot prices will either go wide -- expand or diminish -- go narrow
The [fishing] technique was to clear the channel downstream from the lagoon for about twenty to forty yards, but not all the way to the salt water. A small bridge was left at the lower end of the lagoon. When holding pits had been dug near the end of the re-trenched channel and everyone was ready, the bridge was dug out and the outrush of water brought hundreds of fish along with it.
bridge
The ecological importance of the manatee is clear: scientists have demonstrated the dependancy of all components of an ecosystem on one another.
Early treatments with metals (arsenic, bismuth, mercury) led to the cynical summary of syphilitic infection as 'one night with Venus, a lifetime with Mercury'.
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