The only convincing evidence for life on Mars will be when we have a microbe in the lab from a sample return mission.

火星上存在生命的唯一可信依据将会是我们实验室里有从返回任务带回的样本中提取的微生物。

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The members were kept away from the world in an attempt to simulate the effects of a return voyage to Mars.

他们曾经在模拟飞往火星，再返回地球的旅程中与世隔绝。

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It also stressed the need to return samples from Mars to Earth, so they could be fully analyzed by multiple scientists.

CNN: What we've done on Mars, and what's next

At NASA, Hubbard's goals included understanding Mars as a system, looking for potentially habitable environments, examining whether the planet was habitable in the past and preparing to return samples from Mars to Earth.

CNN: What we've done on Mars, and what's next

Perhaps the most impressive statistic produced by NASCAR (and measured by Mars, Inc. tracking data) is that Mars, Inc. receives an impressive 4-to-1 return on investment from their sponsorship in NASCAR.

FORBES: NASCAR Sponsor Mars, Inc. Thrilled With Partnership; Boasts 4-to-1 Return On Investment