Inge Lehmann, who discovered that earth has both an inner and outer core, should be inspiration for any young woman with dreams of becoming a scientist, and on Wednesday Google honored the pioneering seismologist’s 127th birthday with a new animated Doodle.
Lehmann, born on May 13, 1888, made her discovery by analyzing P-waves (primary waves), a high velocity seismic wave that is the first to be recorded by seismographs because it travels through the earth’s core more quickly.
In 1929 Lehmann was studying a large earthquake near New Zealand and observed that some P-waves seemed to bounce off a boundary. This caused a higher frequency of seismic activity within a “shadow zone.” She attributed the phenomenon to an inner core made of different materials. Proven correct, the shadow zone today called the “Lehmann Discontinuity.”
Lehmann was educated at a progressive school that valued equal treatment between genders. But…
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