Transportation

Watch the world’s largest plane drop a hypersonic aircraft
Aerospace company Stratolaunch has dropped a hypersonic aircraft from its record-breaking Roc launch platform for the first time.
Fully self-driving cars are finally available on Uber
Uber has teamed up with robotaxi operator Waymo to make rides in fully autonomous cars available to its customers.
Autonomous public transportation rolls out in Arizona
Sun City, Arizona has launched a free transit system featuring self-driving cars for its retirement-age residents.
Rolls-Royce tests its first hydrogen-powered plane engine
This amphibious electric tricycle (and camper) costs $14,600 
The technology we (or aliens) need for long-distance interstellar travel
Stanford engineers warn that electric car charging could crash a grid powered by renewable energy 
Walking to school is more likely to keep kids active as they age
Electric planes are coming: Short-hop regional flights could be running on batteries in a few years
Paradox-free time travel is “logically” possible, say physicists
“Up to 2.4 million new apartments” legalized by bipartisan California legislation
Air Canada orders 30 electric-hybrid aircraft for takeoff in 2028