Earth's interior

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New Notes in Earth's Hum

Scientists discover more complex oscillations in planetary symphony

(Newser) - Scientists have discovered a new dimension to the sub-aural sound emanating from our planet’s crust, dubbed “Earth’s hum.” Researchers have known about the hum, detectable only by seismometers, for a decade, though its ultimate cause is unclear. They expected to find hidden oscillations, but the amplitude... More »

Top 10 Planet Earth Puzzlers

Even basic questions still have scientists scratching their heads

(Newser) - Forget deep-space exploration; even basic questions about Earth still have scientists scratching their heads, LiveScience reports. A panel of geologists and planetary scientists lists its top lingering mysteries.
  1. How did Earth form into such a distinct body?
  2. What happened during Earth's first 500 million years?
  3. How did life start on
... More »

Earth's Mystery Core Plumbed

Japanese geophysicist floats theory of lifecycle for Earth's plates

(Newser) - Climate change has sparked heated debate about the Earth’s surface, but a controversial new theory is directing scientists to its core, Der Spiegel reports. To explain why contintental plates drift on the surface of the Earth's molten mantle, Maruyama Shigenori, a leading geophysicist, argues that continents actually have life... More »

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