Phenomena has been in occasional use as a singular since the early 18th century, as has the plural phenomenas. Our evidence shows that singular phenomena is primarily a speech form used by poets, critics, and professors, among others, but one that sometimes turns up in edited prose.
First, and foremost, European Exploration in the New World caused the Columbian Exchange. The Columbian Exchange was the transfer of plant species, animal species, human beings and diseases between the New World and Old World following Columbus’ 1492 voyage.
Al año 2020, la NASA está apoyando la Estación Espacial Internacional y supervisando el desarrollo del vehículo multiuso de tripulación Orión, el sistema de lanzamiento espacial y vehículos Commercial Crew Development (tripulados comerciales).
The Russian World - russianworld.net