Originally posted by mikesingh
ArMap Can you sort this out? Any other link than the one you provided in your thread?

The Allan Hills, like several other ranges in Antarctica, provide a great place to look for meteorites. Ancient ice sheets, thousands of years old and thousands of feet thick, push against the rocky hills and are slowly lifted to the surface, where a constant wind evaporates the ice.
Anything that's fallen on the ice in the previous 50,000 years or so remains behind.

Until humans arrived on the scene, nothing fell there but rocks from space. In 1984, a researcher found the Allan Hills meteorite and applied the standard designation to the specimen — an abbreviation describing location, year and order of discovery: ALH 84001.

For the next decade, an array of scientists examined the rock and made some surprising discoveries: It was volcanically formed on a planet and incredibly old, nearly as old as the solar system itself. It contained materials rare on Earth that carried elemental fingerprints for Mars (known since the Viking landers recorded Martian chemistry in 1976). It had been exposed to flowing water at some point before it left Mars.

The JSC team's responses: Though as much as 80 percent of organic PAHs in the rock did come from water flowing through Antarctic ice, a study from the University of Arizona confirmed that at least 20 percent bear chemical signatures from Mars. And these are concentrated in the small areas of the rock where the JSC team claimed evidence of life.