Vanguardia de la Ciencia had a large audience worldwide. Although exact numbers of downloads and listeners are unavailable, Radio exterior de España has 80 million listeners, only surpassed by the BBC and Radio Vaticana. In addition, Vanguardia de la Ciencia was retransmitted by several radio stations in Latin America and Spain. The program was popular throughout the Spanish-speaking world
Format
The program aimed at being accessible to everyone with an interest for science. Some basic knowledge of science was required to get the most it, as it often went into some technical detail, especially in the interviews. The audio production was of top quality.
Science news. The program started with a review of science news.
Interviews. The news section was usually followed by an in-depth interview with a Spanish-speaking scientist, focusing on a recent publication in a major scientific journal.
Biographies. The biography of a great scientist was often included. These were written by . They were written in the first person, and usually set at a point in time when the scientist was old, and told the story of his or her life and achievements.
Letters from Ulises. Many of the programs included a section called "Cartas de Ulises". Ulises was presented as a friend of the program, who acted as a correspondent. His letters often started with stories from his childhood in rural Spain, which illustrated a scientific concept. In some of the programs, this section was more frivolous, such as when Ulises travelled in time, and performed an interview with Lucy, with simultaneous translation to Spanish. The contributions of Ulises were not credited, but in an interview at , Ángel Rodríguez Lozano revealed that Ulises, in fact, was himself, and that the stories were inspired by people and events from his own childhood.
Correspondence. Near the end of the program, Ángel Rodríguez Lozano read a letter from a listener. The letters have included questions about permission to redistribute the audio. These have consistently been answered that the audio is freely redistributable, both by individuals and radio stations, with no need for signing a special agreement, as long as the source, Radio Exterior de España, is clearly stated. The letters also included questions for the section La ciencia nuestra de cada dia. In addition, some letters were from listeners who were learning Spanish, who found the program helpful for that purpose.
Everyday science. In the section La ciencia nuestra de cada dia, Ángel Rodríguez Lozano answered questions from listeners, requesting explanations of observations of natural phenomena and curious observations. Often, a question was read one week, and answered the next, and it was evident that much research had been put into giving a thorough answer.
Termination of Vanguardia de la Ciencia
In June 2007, Vanguardia de la Ciencia and El sueño de Arquímedes were abruptly terminated. In the correspondence section of one of the last programs, Lozano explained, in response to a letter from an outraged listener, that the decision to terminate the program was made due to a re-structuration of RNE, and that he was but one of 4,150 employees who had to leave. In the previously referenced interview, he explained that everyone older than 52 years had to retire early, and that he was 54 years old at the time. The decision to terminate the programs was widely criticized in Spanish-speaking blogs.
Available programs
At the web-site of RNE, 36 programs are still available. In addition, 62 previous programs are available at an external site.