festive

https://www.flickr.com/photos/dgoomany/4976899712/in/photolist-8zMUTJ-95V2bM-95vZCr-bg6EZP-bg6EPK-imig5J-puUsZE-dzGbmr-7oUD8x-bg6ERK-7jerR-bzPS8Z-94EZBY-awZ7vV-aySuni-5MsrQy-bg6EUZ-bg6EWn-7tiDiz-4jkQkJ-qHexFo-7kiPP9-bg6EVR-4a8iCE-8XXY8f-aW7sMV-5G3W9E-pzEU3c-aLf26z-4eQ7xP-qfjeHw-aXpEiv-5SfiBm-8Yr4jh-5QvtGp-dRYuqa-7shw7f-6Lc1HA-4cCEL7-imkmqF-aLfbAn-aLf2m4-4gzAoJ-aPWJuV-5SaYUB-nQNZpY-5M2J7s-4aF3nu-5CkR3h-5USmxq

Festive Science

Elizabeth Hopper talks us through some of the science behind Christmas.