Iranian Biology Olympiad Iranian Biology Olympiad Iranian Biology Olympiad (IrBO) is an annual multistage competition for Iranian high school students of the age of 17-18 in the field of biology. The first Iranian Biology Olympiad was launched under the auspices of the Ministry of Education, Iran in 1999. Since then, the four winners of the national competitions participate regularly yearly in the International Biology Olympiad (IBO), in which IrBO is a regular member and participant. In Iranian Biology Olympiad individuals compete for their achievements in both theory and practice. IrBO tried to challenge and stimulate gifted students to expand their talents and to
How many angels can dance on the head of a pin? How many angels can dance on the head of a pin? The question "How many angels can dance on the head of a pin?" (alternatively ""How many angels can stand on the "point" of a pin?"") is a reductio ad absurdum of medieval scholasticism in general, and its angelology in particular, as represented by figures such as Duns Scotus and Thomas Aquinas. It is first recorded in the 17th century, in the context of Protestant apologetics. The question has also been linked to the fall of Constantinople, with the imagery of scholars debating about minutiae while the Turks besieged the