Although many scientists contributed along the way, it was three men who really brought the transistor to life, and each played a different role: the thinker, the tinkerer, and the visionary. John ...

It’s normal for your mood to change in response to different situations, news, or challenges you encounter throughout a day. But if your mood shifts dramatically between extreme highs and lows, it may ...

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Bipolar disorder is a mood disorder that includes at least one manic episode – characterized by elevated or agitated mood and often reduced need for sleep – accompanied by episodes of major depression ...