Season
- Season 0 1998-12-27
- Season 1 1970-01-01
- Season 2 1970-01-01
- Season 3 1970-01-01
- Season 4 1970-01-01
- Season 5 1970-01-01
- Season 6 1970-01-01
- Season 7 1970-01-01
- Season 8 1970-01-01
- Season 9 1970-01-01
- Season 10 1970-01-01
- Season 11 1970-01-01
- Season 12 1970-01-01
- Season 13 1970-01-01
- Season 14 1970-01-01
- Season 15 1970-01-01
- Season 16 1970-01-01
- Season 17 1970-01-01
- Season 18 1970-01-01
- Season 19 1970-01-01
- Season 20 1970-01-01
- Season 21 1970-01-01
- Season 22 1970-01-01
- Season 23 1970-01-01
- Season 24 1970-01-01
- Season 25 1970-01-01
- Season 26 1991-12-26
- Season 27 1970-01-01
- Season 28 1993-12-26
- Season 29 1970-01-01
- Season 30 1970-01-01
- Season 31 1996-12-26
- Season 32 1970-01-01
- Season 33 1970-01-01
- Season 34 1970-01-01
- Season 35 1970-01-01
- Season 36 1970-01-01
- Season 37 1970-01-01
- Season 38 2003-12-26
- Season 39 2004-12-16
- Season 40 2005-12-25
- Season 41 2006-12-25
- Season 42 2007-12-23
- Season 43 2008-12-28
- Season 44 2009-12-21
- Season 45 2010-12-28
- Season 46 2011-12-27
- Season 47 2012-12-26
- Season 48 2013-12-28
- Season 49 2014-12-29
- Season 50 2015-12-28
- Season 51 2016-12-26
- Season 52 2017-12-26
- Season 53 2018-12-26
- Season 54 2019-12-26
- Season 55 2020-12-28
- Season 56 2021-12-28
- Season 57 2022-12-26
- Season 58 2023-12-26
- Season 59 2024-12-29
Royal Institution Christmas Lectures - Season 45 Episode 3 Why Mountains Are So Small
5.10 60 minutes Why is the tallest building on earth less than half a mile high? Why don't we have mountains as tall as those on Mars?
In the last of this year's Christmas Lectures, Dr Mark Miodownik investigates the world of the very big and very tall. He reveals that, at this scale, everything is governed by a battle with one of the strangest forces in the universe - gravity.
With help from acrobats, levitation devices, spiders, birthday cake candles and even some sticky goo, Mark discovers how gravity can make solid rock behave like a liquid and investigates whether one day it might be possible to build a structure from Earth into space, taking us beyond the reach of gravity without the use of rocket.
