S.J. Gould and Donald Johanson on Charlie Rose

I'm hard at work on my book today (I intend to finish the chapter on whales by the end of the weekend) but I won't leave you hanging. Here's a Charlie Rose episode from 1994 featuring both Stephen Jay Gould (starting at the 29:10 mark) and Donald Johanson (starting at 45:25, with a rather unfortunate introductory blurb);