"Our sense has been that while Mars is a lousy environment for supporting life today, long ago it might have more closely resembled Earth," said Andrew H. Knoll, also of Harvard and on the study team.

研究小组的另一位来自哈佛大学的安德鲁?H?诺尔说：“过去我们一直觉得，虽然火星现在的生存环境很恶劣，但在很久以前，火星的生存环境可能与地球很相似。