"It is a question of learning their limits, living within their limits and then they will find that the limits expand, " she said.

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It will also examine the general chemistry of the sub-surface layers, to see if it is within the limits tolerable by living things on Earth.

ECONOMIST: Exploring Mars

John Stewart, chairman of the UK Noise Association in London said the study echoed anecdotal reports from people living under flight paths who said even when levels were within recommended safety limits, noise could still be bad for your health.

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