SAN JUAN, Puerto Rico – A glowing lagoon off Puerto Rico’s northeast coast has gone nearly dark and biologists on Tuesday were trying to find out why. Theories range from an increase in construction ...

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At night in a lagoon fringed with mangrove thickets, kayakers set their paddles down and look to the dark water for a secret of nature seen in few places. You simply run a hand through the water, and ...

(AP) A glowing lagoon off Puerto Rico’s northeast coast has gone nearly dark and biologists on Tuesday were trying to find out why. Theories range from an increase in construction runoff to inclement ...