Iris Hendriks of the Mediterranean Institute for Advanced Studies recently analysed data from a wide sample of research into how individual organisms respond to increased carbon dioxide in their seawater.

ECONOMIST: Ocean acidification

Project scientist John Grotzinger pointed out that such a search would require more sophisticated scientific equipment than even the advanced rover carries, if not a full-scale sample return mission.

MSN: Curiosity aims to unlock Mars mysteries - Technology & science - Space - Space.com | NBC News