WASHINGTON (AFP) - US beekeepers have been stung in recent months by the mysterious disappearance of millions of bees threatening honey supplies as well as crops which depend on the insects for pollination. Bee numbers on parts of the east coast and in Texas have fallen by more than 70 percent, while California has seen colonies drop by 30 to 60 percent. According to estimates from the US Department of Agriculture, bees are vanishing across a total of 22 states, and for the time being no one really knows why. "Approximately 40 percent of my 2,000 colonies are currently dead...