Why do so many Martian Meteorites have biogenetic features?

I was thinking about the Alan Hills meteorite in a separate discussion in another sub. Why do so many of these Martian meteorite have fossils, coal, and water ?

Fossils: https://en.wikipedia.org/wiki/Allan_Hills_84001#Hypothetical_biogenic_features

Coal : http://www.scmp.com/news/china/article/1667636/coal-found-meteorite-points-life-mars-says-chinese-led-research-team

Water : https://www.theguardian.com/science/2013/jan/03/mars-meteor-water-sahara-analysis

Submitted February 19, 2018 at 07:43AM by androidbitcoin http://ift.tt/2Cx3rW8