Japanese scientists say that silicon is likely the mystery element in the Earth’s inner core, claiming progress on solving one of the planet’s deepest secrets. It discovered that the data for the mixed material observed with X-rays matched seismic data—namely, sound velocity, or seismic waves—obtained for the inner core. “Our latest experiments suggest that the remaining five percent of the inner core is composed mostly of silicon,” Ohtani told AFP on Wednesday. He said that the finding helps understand whether the Earth’s surface was rich in oxygen in its early formation before photosynthesis began as oxygen has been another potential candidate for the mystery element in the Earth’s inner core. But if the mystery element in the core is oxygen then the rest of the Earth was oxygen-poor in the beginning.
Source:   Prothom Alo
January 12, 2017 07:05 UTC