Also known as "blue field entoptic phenomenon" and "blue sky sprites", the little dots move in time with your heartbeat.

Though today it’s one of the city’s more impressive, high-ceilinged art galleries, Blue Sky’s origins trace to a strip mall ...

A mysterious spiraling blue light illuminated the night skies over Europe on Monday. The cosmic whirlpool was captured in stunning video and appears to have been created by the SpaceX Falcon 9 rocket ...