b'LETTER FROM THE PRESIDENTCarnegie, Einsteins Eclipse,and a Century of ChangingScientific HistoryOne hundred years ago, a solar eclipse gave Carnegie CARNEGIE INSTITUTION astronomers the opportunity to conduct a global FOR SCIENCE experiment that provided a test of Einsteins theory of relativity. Today, a century after Einsteins Eclipse, the alignment of the Moon and Sun continues to intrigue and 1530 P Street, NWinspire us. Washington, D.C.20005-1910 I thought about that early experiment last month, 202.387.6400 when I joined a group of Carnegie colleagues, trustees, and supporters on a trip to Las Campanas to view the total solar eclipse. I still dont have the words to describe the experience of standing in the Atacama Desert, just below President our Las Campanas Observatory, and watching as the Moon Eric D. Isaacs. obscured the Sun. It made me think of the sense of awe Director, Department of Embryology that must have inspired the Carnegie astronomers as they Yixian Zheng observed the eclipse and sought to record the minute, temporary changes in the . geomagnetic field that would indicate Einsteins predicted gravitational bending of Director, Geophysical Laboratory starlight passing near the Sun. Michael Walter As we look at the wide-ranging articles in this issue of Carnegie Science, its clear . that our researchers continue to be driven by the same insatiable intellectual curiosity Acting Director, Department ofGlobal Ecology and independence that have been our hallmarks from the beginning. Whether theyre Joe Berry exploring the planetary characteristics necessary to support extraterrestrial life or the . impacts of plastic contamination on coral reef ecosystems or detecting an unusual Director, The Observatories chemical signature with clues to a supernovas mysterious origins, Carnegie researchers Crawford H. Greenewalt Chair are grappling with some of the most challenging questions in science today. John Mulchaey Our ability to push the boundaries of scientific investigation and achieve new . discoveries is strengthened and supported by the commitment of our Board of Acting Director, Department of Plant Biology Trustees. We are very proud to welcome the incoming leaders of the Carnegie Board of Zhiyong Wang. Trustees. Craig Barrett, our new chair, is the former president and CEO of Intel Director, Department of Terrestrial Magnetism Corporation. He is joined by vice chair David Thompson, former president and CEO of Richard Carlson the global aerospace and defense company Orbital ATK. As youll see from their . biographies, these two distinguished executives bring great depth of scientific Chief Operating Officer expertise and leadership experience to this new assignment. We look forward to Timothy Doyle working with Craig and David as Carnegie continues to pursue its mission of . transformational discovery and innovation, and I thank Steve Fodor and Suzanne Nora Chief Development Officer Johnson for their strong leadership as cochairs and Bruce Ferguson as vice chair. Ann McElwain One last thought: During our trip to Las Campanas we learned about the ancient . indigenous people of Chile, the Mapuche, wholike uswere fascinated by the Sun Editor and the stars. They made detailed records of the night sky and the movements of the Tina McDowell Sun, and their artists delighted in astronomical motifs. As we look back on Carnegies . history of discovery, its important for us to remember that the work that we do is built Science Writeron millennia of curious, intelligent men and women around the world looking up at Natasha Metzler the sky, or at the world around them, and asking Why? I am so proud to be a part of this great institution as we work together to answer the biggest, most challenging questions of our time and as we build on a tradition of curiosity, exploration, and discovery that is as old as humanity itself.Eric D. Isaacswww.CarnegieScience.edu President'