From July 25 to September 23, 2001, red rain sporadically fell on the southern Indian state of Kerala. Heavy downpours occurred in which the rain was colored red, staining clothes pink. Yellow, green, and black rain was also reported. Colored rain had been reported in Kerala in as early as 1896 and several times since then.
It was initially thought that the rains were colored by fallout from a hypothetical meteor burst, but a study commissioned by the Government of India found that the rains had been colored by airborne spores from locally prolific terrestrial algae.
It was not until early 2006 that the colored rains of Kerala gained widespread attention when the popular media reported that Godfrey Louis and Santhosh Kumar of the Mahatma Gandhi University in Kottayam proposed a controversial hypothesis that the colored particles were extraterrestrial cells.
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