French Federation of Speleology 10 years, named the "Bulletin of the CNS". Simultaneously, the SSF ceased publication of its periodical bulletin to provide its official information bulletin in the new "CNS". From 1952, cave training courses were organised in partnership with the Ministry of Youth Affairs and Sports. From 1953, Guy Lavaur organised cave diving activities. In conjunction with the Fédération nationale de sauvetage (National Rescue Federation), a certificate of first degree fitness was created in 1954. The first International Congress of Speleology was held in Paris from 7–12 September 1953 under the patronage of the Minister of National Education, as well as the
Exploration Earth: The Time Machine BBC Radio 4. "Exploration Earth: The Time Machine" was released on CD, paired with "Genesis of the Daleks", in 2001. It was also given away on its own as a free CD with the 28 April 2010 edition of "The Daily Telegraph" newspaper via WHSmith. It was re-released on CD in The BBC Radio Episodes but this time paired with What Happened to...Susan?, a 1994 spoof from the radio comedy series What Happened to...? Exploration Earth: The Time Machine "Exploration Earth: The Time Machine" is an episode of the BBC Schools radio drama series "Exploration Earth", a series exploring geography.