semiconductor conductivity increases with temperature

Semiconductors usually conduct electricity better when they get hotter

Metals usually conduct electricity less well as they heat up. Semiconductors often do the opposite: higher temperature gives more electrons enough energy to carry current, so conductivity increases.

An Indigenous slavery historian challenges the usual account of Caribbean deaths

Disease devastated Indigenous communities after European colonization of the Americas. But historian Andrés Reséndez argues that enslavement, forced labor and displacement played an even larger role in some early Caribbean population collapses than commonly acknowledged. The interpretation highlights how epidemics and colonial exploitation interacted rather than operating as separate causes.

The Russian Empire covered a sixth of Earth's land

At its late-19th-century height, the Russian Empire covered about 22.8 million square kilometers. By area, it was the third-largest empire in history, after the British and Mongol empires.

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semiconductor conductivity increases with temperature

Semiconductors usually conduct electricity better when they get hotter

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