Update Notes

via xkcd.com https://xkcd.com/2010/ by xkcd

Hertzsprung-Russell Diagram

via xkcd.com https://xkcd.com/2009/ by xkcd

Irony Definition

via xkcd.com https://xkcd.com/2008/ by xkcd

Brookhaven RHIC

via xkcd.com https://xkcd.com/2007/ by xkcd

Customer Rewards

via xkcd.com https://xkcd.com/2006/ by xkcd

Attention Span

via xkcd.com https://xkcd.com/2005/ by xkcd

Sun and Earth

via xkcd.com https://xkcd.com/2004/ by xkcd