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Message from mission organizer Sean W. The power of the individual to affect change is only limited by his or her imagination. Yesterday I imagined a plan to help the victims of the earthquake in Haiti. We have all seen the pictures and seen the horror that is transpiring just a few hundred miles from our blessed country. Pain and suffering on a scale that is unimaginable. How can we help? Aggressive, preposterous, insane? No, just committed to contribute and make a difference.

Male mice have unexpectedly been found to switch sex if they lack a gene previously linked with lung development. If the same is true in humans, it might help to explain why some people who are genetically male - they have a Y chromosome - develop female genitals. It could be involved in cases of human sex reversal, says David Ornitz, head of the team that made the discovery at Washington University Medical School in St Louis, Missouri. Are to blame for some of rest? It lo.