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Are Sleepwalking Killers Conscious?

Some people commit violent acts while asleep. In seeking to understand their brain states, scientists and physicians are investigating the murky borders of consciousness

By Francesca Siclari, Giulio Tononi and Claudio Bassetti

Is Your Child Gay?

If your son likes sissy stuff or your daughter shuns feminine frocks, he or she is more likely to buck the heterosexual norm. But predicting sexual preference is still an inexact science

By Jesse Bering

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