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Scanning thousands of native English clips with synchronized subtitles and exact timestamps.
Pronunciation Guide
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Listen to native speakers pronounce “bridgman” in real conversational contexts with synchronized timestamps and subtitles.
And in 2014, a 4.5 billion-year-old meteorite made it possible for geologists to observe, for the first time, the most abundant mineral inside Earth:bridgmanite, which scientists think makes up much of Earth’s super-hot lower mantle.Geologists also study deep Earth through seismology: a field that analyzes seismic waves from earthquakes and other vibrations within the earth.