Nature
1982 · 44 seasons
Season 1Next
1982 · 13 eps.
Season 2
1983 · 13 eps.
Season 3
1984 · 18 eps.
Season 4
1985 · 20 eps.
Season 5
1986 · 20 eps.
Season 6
1987 · 21 eps.
Season 7
1988 · 20 eps.
Season 8
1989 · 20 eps.
Season 9
1990 · 21 eps.
Season 10
1991 · 21 eps.
Season 11
1992 · 18 eps.
Season 12
1993 · 14 eps.
Season 13
1994 · 15 eps.
Season 14
1995 · 14 eps.
Season 15
1996 · 14 eps.
Season 16
1997 · 16 eps.
Season 17
1998 · 16 eps.
Season 18
1999 · 18 eps.
Season 19
2000 · 16 eps.
Season 20
2001 · 17 eps.
Season 21
2002 · 14 eps.
Season 22
2003 · 13 eps.
Season 23
2004 · 13 eps.
Season 24
2005 · 13 eps.
Season 25
2006 · 16 eps.
Season 26
2007 · 13 eps.
Season 27
2008 · 13 eps.
Season 28
2009 · 10 eps.
Season 29
2010 · 16 eps.
Season 30
2011 · 13 eps.
Season 31
2012 · 13 eps.
Season 32
2013 · 19 eps.
Season 33
2014 · 17 eps.
Season 34
2015 · 16 eps.
Season 35
2016 · 17 eps.
Season 36
2017 · 16 eps.
Season 37
2018 · 15 eps.
Season 38
2019 · 18 eps.
Season 39
2020 · 13 eps.
Season 40
2021 · 13 eps.
Season 41
2022 · 13 eps.
Season 42
2023 · 17 eps.
Season 43
2024 · 13 eps.
Season 44
2025 · 13 eps.