How many of the world's lakes have blue water, as opposed to green, brown or some other color? What does a lake's color say about its health, and what causes lake color to change? Scientists know a ...

"Yes, it’s safe," said Hal “Hurricane” Needham, an extreme weather and data scientist in Galveston. Needham said interest has spiked as visitors notice the blue water, which he said can happen for two ...