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Black and White Twins - Again

The odds against having twins, one of whom appears black and the other white, are astronomical at best. It would require a specific set of circumstances and a whole lot of luck. It's the sort of thing that, even if you were able to do it once, you ...

Are Sleep Terrors Genetic?

Are nightmares genetic? A recent study seems to point that way. Nightmares, also known as sleep terrors, affect people from childhood through adulthood. Those affected suffer from waking in a panic, normally screaming, confusion and disorientation. ...

Twins, but definitely not identical

When I was in high school, I hung around with a couple of brothers who, I found out later, happened to be adopted and genetically unrelated. This floored me and the rest of the gang, not because we saw anything bad about it or anything, but because ...

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