I guess you didn't go and look at the other thread so I'll just bring part of it over here.
Rain water sample (left) and after the particles settled (right). Dried sediment (center).
From July 25 to September 23, 2001,
red rain sporadically fell on the southern
Indian state of
Kerala. Heavy downpours occurred in which red-colored
rain fell, staining clothes with an appearance similar to that of blood. People reported yellow, green, and black rain also. Initially, scientists suspected that fallout from a hypothetical meteor burst colored the rains, but a study commissioned by the Government of India found that the rains had been colored by airborne spores from a locally prolific terrestrial
alga.
Then in early 2006, the colored rains of Kerala suddenly rose to worldwide attention after media reports of a conjecture that the colored particles constituted
extraterrestrial cells, proposed by Godfrey Louis and Santhosh Kumar of the Mahatma Gandhi University in Kottayam. An investigation into the isotopic ratios of nitrogen and carbon supported the terrestrial origins of the solid material in the red rain.
The unexplained nature of the red rain phenomena in Kerela has led to speculation of a dramatic sort. Some have postulated that the red rain constitutes a form of hypothetical
microorganism called panspermia. The few scientist who advance the theory of panspermia postulate that those mircoorganisms began life on earth and throughout the universe, denoting an explanation for the
origin of life called the proto-domain theory. As long as an explanation of the red rain phenomenon remains unexplained, theories outside the mainstream like the prot-domain theory will continue to have a following.
http://www.newworldencyclopedia.org/...rain_in_Kerala
The southern Indian state of Kerala where in July-September 2001 a strange red rain fell over a period of several weeks. The rain began on July 25 following reports of a bright flash and boom.
The first red rain fell in the districts of Kottayam and Idukki in the southern part of the state. Other colers, including yellow, green, and black rains were reported. Many occurrences of the colored rain were witnessed over the first 10 days of the phenomenon, followed by less frequent downpours until late September. The coloration of the rain was due to particles in suspension in the rain water. At times the collected water was as red as blood. Typically it fell in very localized areas, no more than a few square kilometers, and for about 20 minutes per shower.
http://www.daviddarling.info/encyclo...of_Kerala.html