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Object 2 | A 14-day old embryo discovered in 1932, the Yale embryo advanced our understanding of early human development and launched the career of Elizabeth Ramsey. #Carnegie125

Meet Lori Willhite, who led a major Geochemistry Lab renovation at Carnegie's Earth and Planets Laboratory.

Have you ever wondered how scientists uncover Earth’s ancient past? Geochronology—the science of dating rocks and geological events—allows researchers to piece together the planet’s history, revealing how it formed, how it has changed, and what its past can tell us about its future.