HD
7.2The Search for Life: The Drake Equation
The Search for Life: The Drake Equation
Dallas Campbell explores the equation which attempts to calculate the number of planets supporting life in our universe.
Tim Usborne
- 2026
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 2003
- 2002
- 2001
- 2000
- 1999
- 1998
- 1997
- 1996
- 1995
- 1994
- 1993
- 1992
- 1991
- 1990
- 1989
- 1988
- 1987
- 1986
- 1985
- 1984
- 1983
- 1982
- 1981
- 1980
- 1979
- 1978
- 1977
- 1976
- 1975
- 1974
- 1973
- 1972
- 1971
- 1970
- 1969
- 1968
- 1967
- 1966
- 1965
- 1964
- 1963
- 1962
- 1961
- 1960
- 1959
- 1958
- 1957
- 1956
- 1955
- 1954
- 1953
- 1952
- 1951
- 1950
- 1949
- 1948
- 1947
- 1946
- 1945
- 1944
- 1943
- 1942
- 1941
- 1940
- 1939
- 1938
- 1937
- 1936
- 1935
- 1934
- 1933
- 1932
- 1931
- 1930
- 1929
- 1928
- 1927
- 1926
- 1925
- 1924
- 1923
- 1922
- 1921
- 1920
- 1919
- 1918
- 1917
- 1916
- 1915
- 1914
- 1913
- 1912
- 1911
- 1910
- 1909
- 1908
- 1906
- 1902
- 1900
- 1898
- 1894
- 1893
- Zimbabwe
- Zambia
- Yugoslavia
- Vietnam
- Venezuela
- USA
- Uruguay
- United Arab Emirates
- Ukraine
- UK
- Uganda
- Turks and Caicos Islands
- Turkey
- Tunisia
- Trinidad and Tobago
- Thailand
- Tanzania
- Taiwan
- Syrian Arab Republic
- Switzerland
- Sweden
- Swaziland
- St. Kitts and Nevis
- Sri Lanka
- Spain
- Soviet Union
- South Korea
- South Africa
- Somalia
- Solomon Islands
- Slovenia
- Slovakia
- Singapore
- Serbia
- Senegal
- Saudi Arabia
- Rwanda
- Russia
- Romania
- Qatar
- Puerto Rico
- Portugal
- Poland
- Philippines
- Peru
- Paraguay
- Papua New Guinea
- Panama
- Palestinian Territory
- Pakistan
- Oman
- Norway
- Northern Ireland
- North Korea
- Nigeria
- Niger
- Nicaragua
- New Zealand
- Netherlands Antilles
- Netherlands
- Nepal
- Namibia
- Myanmar
- Mozambique
- Morocco
- Montenegro
- Mongolia
- Monaco
- Moldova
- Mexico
- Mauritius
- Malta
- Mali
- Malaysia
- Malawi
- Macedonia
- Luxembourg
- Lithuania
- Liechtenstein
- Libyan Arab Jamahiriya
- Liberia
- Lebanon
- Latvia
- Lao People's Democratic Republic
- Kyrgyz Republic
- Kuwait
- Kosovo
- Kenya
- Kazakhstan
- Jordan
- Japan
- Jamaica
- Italy
- Israel
- Ireland
- Iraq
- Iran
- Indonesia
- India
- Iceland
- Hungary
- Hong Kong
- Honduras
- Haiti
- Guinea-Bissau
- Guatemala
- Grenada
- Greece
- Ghana
- Germany
- Georgia
- French Polynesia
- France
- Finland
- Fiji
- Faeroe Islands
- Ethiopia
- Estonia
- Eritrea
- Equatorial Guinea
- El Salvador
- Egypt
- Ecuador
- East Germany
- Dominican Republic
- Djibouti
- Denmark
- Czechoslovakia
- Czech Republic
- Cyprus
- Cuba
- Croatia
- Cote D'Ivoire
- Costa Rica
- Congo
- Colombia
- China
- Chile
- Chad
- Canada
- Cameroon
- Cambodia
- Burkina Faso
- Bulgaria
- Brunei Darussalam
- Brazil
- Botswana
- Bosnia and Herzegovina
- Bolivia
- Bhutan
- Bermuda
- Belize
- Belgium
- Belarus
- Barbados
- Bangladesh
- Bahrain
- Bahamas
- Azerbaijan
- Austria
- Australia
- Aruba
- Armenia
- Argentina
- Antarctica
- Anguilla
- Angola
- Algeria
- Albania
- Afghanistan
7.2