
How math’s ‘hairy ball theorem’ could explain bad hair days
<a href="https://news.google.com/rss/articles/CBMiogFBVV95cUxNR084NEhydEVuM1RkRjg2akYwRzZmUXgxYXNjYjY0YmhBc1dvSFhOdWpnS3B3NmxROTJDVGVmRDRZQzk3cjhzT25UVU4xR0ljSm45aG1MTzhxTXZ5WkZDb1dXN19lZ2RsTndsV190TnBPaXdFbllYMVFwVXFLVURPaGVEbGpGcjFTUnhiLTRwMU42SF93NnJwRk9SM1JSbWY0TkE?oc=5" target="_blank">How math’s ‘hairy ball theorem’ could explain bad hair days</a>&nbsp;&nbsp;<font color="#6f6f6f">Scientific American</font>
