Download 4K
Download HD
Download HD
Download HDSeason
- Season 0 1984-09-24
- Season 1 1983-10-30
- Season 2 1984-05-06
- Season 3 1984-11-04
- Season 4 1985-09-15
- Season 5 1986-10-05
- Season 6 1987-09-20
- Season 7 1988-09-18
- Season 8 1989-10-01
- Season 9 1991-01-06
- Season 10 1991-11-24
- Season 11 1993-01-03
- Season 12 1994-02-20
- Season 13 1994-11-27
- Season 14 1996-01-14
- Season 15 1996-10-06
- Season 16 1997-10-19
- Season 17 1998-10-11
- Season 18 1999-10-03
- Season 19 2000-10-08
- Season 20 2001-10-07
- Season 21 2002-10-13
- Season 22 2003-10-12
- Season 23 2004-10-14
- Season 24 2005-10-19
- Season 25 2006-10-18
- Season 26 2007-04-04
- Season 27 2008-01-04
- Season 28 2008-11-11
- Season 29 2009-10-28
- Season 30 2010-07-08
- Season 31 2011-08-01
- Season 32 2012-07-19
- Season 33 2013-05-17
- Season 34 2014-04-11
- Season 35 2015-02-24
- Season 36 2016-04-14
- Season 37 2017-03-20
- Season 38 2018-03-31
- Season 39 2019-04-07
Season 39 Episode
- Season 12 Sex, Hot Eruptions and Chili Peppers
- Season 12 Firebird
- Season 12 Killer Whales: Wolves of the Sea
- Season 12 Toadskin Spell
- Season 12 Island of the Ghost Bear
- Season 12 Webs of Intrigue
- Season 12 Vampires, Devilbirds and Spirits: Tales of the Calypso Isles
- Season 12 Pandas of the Sleeping Dragon
- Season 12 The Witness Was A Fly
- Season 12 Untangling the Knot
- Season 12 Snowdonia: Realm of Ravens
- Season 12 Race For Life: Africa's Great Migration
- Season 12 Islands in the African Sky
- Season 12 Comrades of the Kalahari
Natural World - Season 12 Episode 4 Toadskin Spell
7.00 60 minutes Looks at the extraordinary properties of frog and toad skin, showing how it enables them to survive hostile environments. Amphibian skin contains many chemical compounds, including antibiotics, fungicides, anti-viral agents and toxins, which serve as built-in barriers against infection and protection from predators. Scientists in America have even identified an anti-cancer agent in the skin of certain amphibians. One sequence reveals a dangerous and illegal craze in California for toad licking - the skin of some toads contains hallucinogens so powerful that the US Drug Enforcement Agency puts it in the same class as heroin. The programme features toad and frog species from Britain and the continents of Africa, America, Asia and Australia.
