Bat blood? Fungal spores? Dust from Arabia? Algae? A few years back roughly 50 tons of something red fell on India. I remember the news, and I remember how no one had an explanation. What I do not remember, however, is the point when I forgot about the whole issue.
Now Popular Science has run an article on the phenomenon, and it seems that after five years of testing, no one is still certain. But the number one explanation sounds interesting: it came from outer space.
