diff --git a/home/emacs/elfeed.org b/home/emacs/elfeed.org
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 ***** [[https://www.youtube.com/feeds/videos.xml?channel_id=UCeXksuVW8H1x9v4gh7DWoyQ][Physics for the Birds]]
 ***** [[https://www.youtube.com/feeds/videos.xml?channel_id=UCUHW94eEFW7hkUMVaZz4eDg][minutephysics]]
 **** Maths :maths:
+***** [[https://www.youtube.com/feeds/videos.xml?channel_id=UCoxcjq-8xIDTYp3uz647V5A][Numberphile]]
 ***** [[https://www.youtube.com/feeds/videos.xml?channel_id=UCSju5G2aFaWMqn-_0YBtq5A][Stand-up Maths]]
 ***** [[https://www.youtube.com/feeds/videos.xml?channel_id=UCRfo-DAifrP3lzcxUHtGm_A][Tom Rocks Maths]]
 **** [[https://www.youtube.com/feeds/videos.xml?channel_id=UCsXVk37bltHxD1rDPwtNM8Q][Kurzgesagt - In a Nutshell]]