Mystery of the black lagoon: Scientists left baffled after famous Puerto Rican water that usually glows plunges into darkness

  • Fajardo lagoon usually glows when organisms in the water are disturbed
  • For the past nine days the water in the lagoon has remained dark
  • Biologists don’t know why it’s stopped glowing and are investigating
  • Nearby construction work, or bad weather could be to blame


PUBLISHED: 10:21 EST, 20 November 2013 | UPDATED: 11:03 EST, 20 November 2013

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