Titan methane ethane clouds liquid methane rain

It rains liquid methane on Saturn's moon Titan

Titan is so cold that methane and ethane can behave much like water does on Earth. They form clouds, fall as rain, flow across the surface, and collect in lakes and seas.

Unclean hands often spread childbirth fever

Childbed fever was a major cause of maternal death. Clinicians often spread it with unclean hands and tools. The disease’s decline followed the acceptance of germ theory and, later, the discovery of antibiotics.

Industrial weapons and medicine aided conquest

European involvement in Africa had been largely limited to the coasts for centuries. In the late 19th and early 20th centuries, industrial weapons helped Europeans defeat military resistance, while quinine and other medical advances made tropical diseases less of a barrier.

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Titan methane ethane clouds liquid methane rain

It rains liquid methane on Saturn's moon Titan

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