Geothermal energy taps the heat of Earth's interior — Iceland generates nearly 100% of electricity and heating this way.
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The modern emoji originated in Japan in 1999, designed by Shigetaka Kurita for a mobile internet platform.
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In 1971, the first email was sent.
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The first hard disk drive, released by IBM in 1956, weighed over a ton and stored just 5 MB of data.
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