The glow is caused by bioluminescence. According to Texas A&M at Galveston, it can be seen this time of year if the conditions are just right. The reason for the blue water -- bioluminescence.

There’s a purple-bluish glow coming from some of the lights above highways in Western Pennsylvania. It’s a bizarre look. What’s causing it, and is anything being done to address it?

The glow is caused by bioluminescence. According to Texas A&M at Galveston, it can be seen this time of year if the conditions are just right. The reason for the blue water -- bioluminescence.

Mysterious blue flashes were seen in the sky above a Moroccan city as a deadly earthquake, that has so far claimed thousands of lives in the country, struck.

Last year, a trust illuminated the clock tower and, after a great reception, decided to take it a step further.

Instead the blue light we see is scattered sunlight. ... Those sodium atoms are high above the turbulent ... So the sky isn’t blue, at least not always. It is a glow-in-the-dark night sky ...

Pink squirrels and green sharks—why do so many animals ‘glow’ in UV light? ... moon, and you’ll notice that it’s a haunting blue. ... the glowing sea turtles and sharks mentioned above.