Many leading researchers believe that over the past four years, science has been increasingly supplanted by opinion and politics emanating from the White House. NPR's Tavis Smiley talks with Lawrence Krauss, director of the Center for Education and Research in Cosmology and Astrophysics at Case Western Reserve University, and Charles Arntzen, director of the Center for Infectious Diseases and Vaccinology at Arizona State's Biodesign Institute.
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