<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><span class="Apple-tab-span" style="white-space:pre"> </span><div>Just for fun: </div><div><br></div><div><img apple-inline="yes" id="2B388F4D-0D3A-4B75-8712-89AE12205432" height="280" width="499" apple-width="yes" apple-height="yes" src="cid:954DB83B-725C-4CF4-BD86-976EBD63EC7E@nottingham.ac.uk"></div><div><br></div><div><br></div><div>See also: <a href="https://twitter.com/stevenstrogatz/status/555000195881394177">https://twitter.com/stevenstrogatz/status/555000195881394177</a></div><div><div apple-content-edited="true"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>-<br><br><br><br><br><br><br><br><br><br><br></div><br></div></body></html>