Some people could not believe red rainfalls in Kerala, India (notes 1
& 2) could have contained mammalian red blood cell remains that came
from Mars via a comet.

Recently I found the following figure to prove it, so I marked it for
seven red blood cell remains of mammals magnified to over 6,000X:
http://www.wretch.cc/album/show.php?i=lin440315&b=29&f=1782738620&p=29

Research article and source of the above figure:
http://arxiv.org/PS_cache/astro-ph/pdf/0601/0601022v1.pdf  (See Fig.
12)

Note1:My previous post entitled Red rain came from Mars via comet
http://wretchfossil.blogspot.com/2011/03/red-rain-came-from-mars-via-comet.html

Note 2: Wikipedia article on the red rain http://en.wikipedia.org/wiki/Red_rain_in_Kerala