Re: 'Martian features' found on Earth
Could go either way. The article makes it clear that theses "nano-bodies" might very well have a non-biological origin:
"But the researchers also suggest the carbonates could have formed spontaneously through precipitation. If this were shown to be true, it would cast doubt on theories that ALH84001 contains remnants of Martian life."
More importantly, the article supports the need for the Mars sample return mission:
"The controversy may only be solved once space missions return to Earth with rocks from the Red Planet."
Touche'.