really good article in general.  i thought it was worth pointing out this neil degrasse tyson clip in particular, linked at the end to tie the discussion back to the present day:
<a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=6EkuXfsWmMo" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=6EkuXfsWmMo</a>