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A host of astrophysical measurements suggest that most of the matter in the Universe is an invisible, nonluminous substance that physicists call “dark matter.” Understanding the nature of dark matter is one of the greatest challenges of modern physics and is of paramount importance to our theories of cosmology and particle physics. This text explores one of the leading hypotheses to explain dark matter: that it consists of ultralight bosons forming an oscillating field that feebly interacts with light and matter. Many new experiments have emerged over the last decade to test this hypothesis, involving state-of-the-art microwave cavities, precision nuclear magnetic resonance (NMR) measure...
List for March 7, 1844, is the list for September 10, 1842, amended in manuscript.
Join the author in reliving Sylvania's over 180 years of history from footpaths to expressways and beyond, in volume two of an eight volume set. With 30 years of research she has included every subject imaginable that helped bring Sylvania to where they are today, with excellent schools, over-the-top parks and recreation, rich beautiful homes, commercial and industrial businesses and a quaint historical dowtown that looks like it was planned by Norman Rockwell himself. This book is a treasure trove of information for the thousands who have ancestors that once lived and helped Sylvania grow through these years. Located in northwestern Ohio, Sylvania is a suburb of Toledo, Ohio and for many ye...
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pt. 1. List of patentees.--pt. 2. Index to subjects of inventions.