All facts sourced from:
Merriam-Webster Dictionary, NY Daily News, Scientific American, Discovery News, Technophilic Hubris and Espionage Styles during the Cold War by Kristie Macrakis, How cats purr" by Dawn E. Frazer Sissom, D. A. Rice, and G. Peters, Lincoln at Home: Two Glimpses of Abraham Lincoln's Family Life by David Herbert Donald, Feline fortunes: Contrasting views of cats in popular culture by EA Lawrence, Responses of elbow extensors to landing forces during jump downs in cats by P. A. McKinley, J. L. Smith, R. J. Gregor, Characteristics of eccrine sweat gland activity in the footpad of the cat by Thomas Adams, CBS Minnesota, Dogs are sensitive to small variations of the Earth's magnetic field by Vlastimil Hart, Petra Nováková, Erich Pascal Malkemper, et al., Training methods and owner–dog interactions: Links with dog behaviour and learning ability by Nicola Jane Rooney and Sarah Cowan, The form and function of retractile claws in the felidae and other representative carnivorans by W. Gonyea and R. Ashworth, Characterisation of plant eating in dogs by Karen Lynn Chieko Sueda, and Nesting and parental care in the mud turtle, Kinosternon flavescens by John B. Iverson
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