: The lecture, titled "Byzantine Scholars and the Union of the Churches," was delivered by Professor Costas Constantinides.
: There are 29 coins in the full series, each representing a different Olympic sport. [18 ] X (2011)
In the world of coin collecting, the "18 x 2011" format is often used to describe sets of the from Great Britain. : The lecture, titled "Byzantine Scholars and the
In the field of entomology and biodiversity, October 18, 2011, is a key collection date for various species discovered in South America, particularly in Ecuador. : The lecture
: Researchers collected 84 larvae of a new caddisfly species at the Reserva Los Cedros in Ecuador on this exact date. This data contributed to the taxonomic revision of the genus Leucotrichia and other Neotropical insects.