Scientists are investigating the possible threat posed to astronauts by inhaling lunar dust.
A study suggests the smallest particles in lunar dust might be toxic, if comparisons with dust inhalation cases on Earth apply.
Teams hope to carry out experiments on mice to determine whether this is the case or not.
Nasa has set up a working group to look into the matter ahead of its planned return to the Moon by 2020.The health effects of inhaling lunar dust have been recognised since Nasa's Apollo missions.
Astronaut Harrison H (Jack) Schmitt, the last man to step on to the Moon in Apollo 17, complained of "lunar dust hay fever" when his dirty space suit contaminated the habitation module after an energetic foray on the lunar surface.
submitted by Shaun A. Saunders
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