Spanish Biology Olympiad experiences in this field. This competition has always included both practical and theoretical examinations. In Spain the first National Biology Olympiad was organised in the Canary Islands by a group of high school teachers. By that time the Community of Madrid and the Community of Valencia had already celebrated their Regional Olympiad for four or five years. Currently, local phases are held in all the national autonomous communities, including Ceuta and Melilla, and the Spanish centres abroad. The Spanish Biology Olympiad is registered under number 585 939, Group 1, Section 1 in the National Registry of Associations of the Ministry
How many angels can dance on the head of a pin? about how many could perch at the same time on the head of a pin"". Dorothy L. Sayers argued that the question was "simply a debating exercise" and that the answer "usually adjudged correct" was stated as, "Angels are pure intelligences, not material, but limited, so that they have location in space, but not extension." Sayers compares the question to that of how many people's thoughts can be concentrated upon a particular pin at the same time. She concludes that infinitely many angels can be located on the head of a pin, since they do not occupy any space there: