A retro-futuristic space truck. A nimble crustacean on wheels. A space-age dune buggy. One will win a multibillion-dollar prize to deploy on a future NASA Artemis mission. But first, we took a ride on ...

Small, battery-powered planes are on the way. But building large, zero-emission airliners is a daunting challenge.

Jupiter will reach its highest point in the sky around dawn, when, from mid-northern latitudes, it will appear about 20 ...