Scientists have determined that a microalgae is responsible for the reddish color that rained down on the Spanish town of Zamora last year; however, the precise origin of the typically non-native organism is still unknown.

Scientists have figured out what caused the rain that fell on a Spanish town last year to be tinged red.
Based on an analysis of the so-called 'blood rain' that had collected in local basins, they determined that the coloring was caused by a microalgae that produces a red pigment when stressed. 
During these more difficult times, the