Spurred by increasing global demand for air travel, aviation emissions have been rising faster than those from rail, road, or shipping in recent decades. Solutions to invert the trend are ...

They found another shape, related to the first, that meets an even stricter definition. Dubbed the "specter," the new shape tiles a plane in a pattern that never repeats without the use of mirror ...

Add Yahoo as a preferred source to see more of our stories on Google. While airlines and regulators scramble for ideas to decarbonize the industry, some engineers are suggesting that an entirely new ...