There’s a reason we’ve sent a rover called "Curiosity" up to Mars: Astronomers want to prove the theory that microorganisms on an asteroid from Mars that crashed into the Earth billions of years ago may have started life here. We do know that fragments from distant planets might have been the "sprouts of life" on this one. Mars may now be dead (NOTE: Subscribers can still listen to this show), but we may live on as the progeny of that planet.
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When you move from one town to another, you can pick up a whole new set of allergies. For instance, people say that about five years after moving to Austin, Texas, you start to get your "Austin allergies." Is that possible?

It’s possible for some people to acquire new allergies, and three to five years of exposure may be enough to trigger them. But there are other reasons why you may feel worse after moving from one city to another, especially a distant city. For example, some people are more sensitive to dry climates, he said, while for others, humid areas can make their noses feel horrible. The air in urban areas may have more irritants, like dust and mold from older buildings, than that in rural settings.
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