Question

what is the reason of blood rain in Kerala in 2001 ?

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Answer 1

Answer:

Most recently, coloured rainfall occurred over Kerala during the summers of 2001, 2006, 2007, 2008, and 2012; since 2001, the botanists have found the same Trentepohlia spores every time. This supports the notion that the red rain is a seasonal local environmental feature caused by algal spores.

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Answer 2

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$\red\implies$It happened due to the theory of panspermia.This red rain appeared to contain red cells, apparently demonstrating that such cells must exist in space.

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