The first recorded use of paper currency in the world is believed to have occurred in China during the Tang Dynasty (618-907 AD). The Chinese used paper money in the form of “jiaozi,” which were paper notes issued by the government that could be exchanged for gold or silver. The jiaozi were used primarily as […]
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Superheated sediments in a submarine pressure cooker—an unexpected source
of deep-sea hydrogen
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The mid-ocean ridge runs through the oceans like a suture. Where Earth's
plates move apart, new oceanic crust is continuously formed. This is often
accompa...
4 hours ago
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