You wait ages for one Google founder to launch a crazy concept for the future of travel, then two come along at once.
Sergey Brin is said to be working on a secretive project to bring a giant zeppelin-style airship to the skies, just a day after a Larry Page-backed startup showed off its flying car.
The sky's apparently not the limit for the entrepreneurial duo: Brin is working on his project at the Nasa Ames Research Centre, which just happens to be a neighbour to Google parent Alphabet's headquarters, Bloomberg reported.
While Brin told the publication "I don't have anything to say about this topic right now", unnamed sources said he was inspired by images of the USS Macron, an airship which docked at the centre in the '30s.
Alphabet leases space in the centre's hangars for its Planetary Ventures business, which works on research, development and testing of "space exploration, aviation, rover/robotics and other emerging technologies", but the zeppelin is apparently a personal project of Brin's (at this stage, anyway).
Flying cars are now all the rage, with at last seven companies working on getting vehicles into the air and Uber becoming the latest to unveil its plans. The startup believes catching a short flight in a vehicle which can take off like a helicopter will cost the same as getting a cab.
But Brin appears to have chosen a different method of flight to tinker around with.
He's not the only one exploring the technology though. UK firm Hybrid Air Vehicles has created the Airlander airship, AKA the flying bum, which it is about to put into fresh test flights, and it's even planning an IPO later this year. Aerospace giant Lockheed Martin has also developed its own hyprid airship.