Undaunted: The Forgotten Giants of the Allegheny Observatory

On an expedition through Latin America, Italian General Italo Balbo made the Atlantic crossing with his seaplane squadron, which left Boloma, entered Brazilian territory via Natal and now ended its journey in the capital Rio de Janeiro. Arrival of the fascist squadron at Enseada de Botafogo. People, many in boats, applaud the descent of the seaplanes. A group of officers searches the soldiers in profile. Italo Balbo, Ambassador Vittorio Cerrutti and Royal Consul Onorevole Mammalella watch the parade of troops. A group of officers with Col. Magdalena, "the intrepid hero of several aerial feats". At the Catete Palace, Balbo and Cerrutti are received by the President of the Provisional Government, Getúlio Vargas, and his ministers. The Italian delegation leaves the Catete Palace.

Armenian radio-engineer Arevik Sargsyan has struggled throughout her life to preserve ROT54, a giant telescope built by her uncle in the 1980s. But the collapse of the Soviet Union meant that ROT54 was left abandoned for 30 years. Now, Arevik is attempting to take control of the telescope and prove it still works.

Today we cut the granite with diamond-cut blade as is one of the most difficult rocks to cut due to its hardness.How could the egyptians, if it was them, have achieved those shapes in the sculpture sphinx of Sénousret made of Migmatite material, which is harder than granite? What was that extraordinary tool that made this possible? This example is what disputes all the official theories of egyptology. Dozen of questions now arise. Did the egyptians really have an advance technology that was losted over time? The answer is in this movie.Lucky is to understand that in 2019, we have a chance to learn how the Great Pyramid was built, who built it, and what its hidden behind it. Let yourself go and come discover the biggest mystery of humanity, the New Great Story!

Travel into the world of aviation and explore the dreams of flight with the Smithsonian as they step into the unknown.

This series also covers the essential concepts of astronomy: gravity, the light spectrum, Earth's magnetic field, the solar system, the sun, Kepler's Law, the universal law of gravitation, the Doppler Effect, and much more!

Guy joins an ambitious engineering project to recover a crashed WW2 Lancaster Bomber – and the remains of its missing crew members – from the depths of the Dutch lake where it’s lain for 80 years.

The 2022 film "Top Gun: Maverick" continues the adventures of the ace fighter pilot made famous by Tom Cruise. But how true to life is the fictional story to the real Naval Fighter Weapons School? TOPGUN flight instructors take us inside the most famous and prestigious training program in the sky, where only the top 5% of U.S. naval aviators are accepted. We reveal the tactics and techniques taught in the classroom and in the air. We also examine how the real Navy TOPGUN came to be, an origin story that is truly stranger than fiction.

China's FAST (Five-hundred-meter Aperture Spherical Telescope) can detect radio signals emitted tens of thousands of light-years away, and engineers have faced unprecedented challenges in constructing a giant radio receptor nestled amid mountains. From novel technological innovations to architectural challenges, we follow every step that gave birth to the biggest radio telescope ever constructed.