Amphitheatre of El Jem, Tunisia

Amphitheatre of El Jem is an oval amphitheatre in the city of, El Djem, Tunisia. It is listed by UNESCO since 1979 as a World Heritage Site. The amphitheatre was built around 238 AD in Thysdrus, located in the Roman province of Africa Proconsulare in present-day El Djem, Tunisia. It is one of the best preserved Roman stone ruins in the world, and is unique in Africa. As other…

A vacuum chamber at NASA Glenn Research Center in Cleveland, Ohio USA

A vacuum chamber at NASA Glenn Research Center in Cleveland, Ohio USA NASA John H. Glenn Research Center at Lewis Field is a NASA center, located within the cities of Brook Park and Cleveland between Cleveland Hopkins International Airport and the Cleveland Metroparks’s Rocky River Reservation, with a subsidiary facility in Sandusky, Ohio. Glenn Research Center is one of ten major NASA field centers, whose primary…