Microsoft co-founder Paul Allen has spent the last six years working on a giant aircraft capable of launching rockets to space. Today, his company Stratolaunch Systems literally rolled that plane out of its hangar in the Mojave Desert for the first time ever.

Two men using an electric power saw to fell a tree circa 1940's. (Photo by Keystone View/FPG/Getty Images)

A general view of the Drax Power Station, illuminated in the colours of the Ukrainian flag, in North Yorkshire, Britain on April 1, 2022. (Photo by Lee Smith/Reuters)

Steam emerges from a cooling tower of the nuclear power plant Leibstadt near Leibstadt, Switzerland, November 18, 2014. (Photo by Arnd Wiegmann/Reuters)

Police officers display their AI-powered smart glasses in Luoyang, Henan province, China on April 4, 2018. (Photo by Reuters/China Stringer Network)

Battersea Power Station. The chimney rims are thinner on top than you might expect. (Photo by Bradley L. Garrett)

A fuel rod is inserted into a reactor vessel inside the No. 1 reactor building at Kyushu Electric Power's Sendai nuclear power station in Satsumasendai, Kagoshima prefecture, Japan, July 8, 2015. Kyushu Electric Power Co started loading uranium fuel rods into a reactor on Tuesday, marking the first attempt to reboot Japan's nuclear industry in nearly two years after the sector was shutdown following the 2011 Fukushima disaster. (Photo by Issei Kato/Reuters)

A view of one of the stands during the inauguration of the Integrated Systems Europe (ISE) fair, the largest audiovisual show in the world, in Barcelona city, Catalonia, north-eastern Spain, 31 January 2023. The event runs until 03 February, gathers 68,000 registered attendees and 1,055 exhibiting companies. (Photo by Quique Garcia/EPA)