Malta's Blue Grotto shines with reflected sunlight ... cave glows from within by casting a magical hue across the water. This glow is a daytime phenomenon and is still a natural wonder that ...

Blue Grotto is one of six caves on Malta, all popular tourist destinations. A remarkable algae glow at Mosquito Bay ... Rico and is best observed from the water. Guinness World Records recognized ...

The research maps biofluorescence across 459 glowing fish species and shows just how varied the colors have become.

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