Universe at a glance (Introduction)
by David Turell 
, Tuesday, February 21, 2012, 00:47 (4660 days ago)
http://www.scientificamerican.com/slideshow.cfm?id=starlight-starbright-cosmic-timeline
Complete thread:
- Universe at a glance -
David Turell,
2012-02-21, 00:47
![[*]](themes/default/images/complete_thread.png "Open whole thread")