Fri 1/23/15 Hr 4 JBS: Heidi Zhou-Castro, al Jazeera America. Carl Zimmer, NYT. Dan Saltzstein, NYT. Ken Croswell, Physics Today.
Summary: Fri 1/23/15 Hr 4 JBS: Heidi Zhou-Castro, al Jazeera America. Carl Zimmer, NYT. Dan Saltzstein, NYT. Ken Croswell, Physics Today.