Intermediate Word: 
  (a) coarse-grained igneous rock  (b) twilled coat fabric  (c) pretzel dough  (d) detritus around a talus cone
Difficult Word: - napiform  (a) conical  (b) J-shaped  (c) turnip-shaped   (d) wasp-waisted

Moon To Mars: What's Beyond? - SpaceDaily  "Today, humanity has the potential to seek answers to the most fundamental questions posed about the existence of life beyond Earth." This vision set forth goals of: returning the Space Shuttle safely to flight; completing the International Space Station (ISS); phasing out the Space Shuttle when the ISS is complete (about 2010); sending a robotic orbiter and lander to the Moon; sending a human expedition to the Moon as early as 2015, but no later than 2020; conducting robotic missions to Mars in preparation for a future human expedition; and conducting robotic exploration across the solar system.  
Should We Terraform? Part III - SpaceDaily  "When we go to Mars, we're actually dealing with a problem that's outside the realm of ethics and more in the realm of enlightened self-interest. We have a number of reasons for preserving Mars as it is. If there's life there, it's evolved over the last several billion years, it's got incredible solutions to incredible problems. If we just go there and willy-nilly ramp it up or tamp it down or try to remold it somehow, we're going to lose that information. So that's not to our best interest. We were talking earlier about having a pharmaceutical expedition to Mars, not just that but a chemical expedition to Mars, people coming and looking for solutions to incredible problems that could occur here on Earth and finding them on Mars. That could generate income unforeseen." - Greg Bear 

Planetary Uncertainty Principle - SpaceDaily  I think it's possible to do the experiment to a level of probability that is less than one. I think we can actually envision examining Mars for signs of life without contaminating it, but we have to realize that if we examine it at all - if we launch anything to Mars - we have the chance of contaminating it. But not more so than probably the chance that Mars would get contaminated naturally by a large impact event that would take material from Earth to Mars today. It's happened many times, and it may happen in the future. It's one of the reasons we (should) talk about terraforming. The biological Heisenberg's Uncertainty Principle is, "can we actually do the experiment?"

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