Santiago Antúnez de Mayolo

Santiago Antúnez de Mayolo was born on 10 January 1887 in the country estate of Vista Bella, province of Aija, Peru, department of Áncash.

[1][2] He studied at Colegio Nacional de la Libertad (Huaraz) and later the College of Our Lady of Guadalupe (Lima), where he met Peruvian writer Abraham Valdelomar.

After this he traveled around Peru, searching for suitable places to construct hydro-electric central power stations.

[2][3] In the Third Pan-American Scientific Congress held in Lima, Antúnez de Mayolo presented the work "Hipótesis sobre la constitución de la materia," proposing the existence of a "neutral element" in the atom.

[2] In 1934, he proposed the existence of the positron in his article "Los tres elementos constitutivos de la materia.