A prototype of a futuristic flying car developed by Bellwether Industries has completed its first untethered test flights.

A new technology for reducing methane emissions in the atmosphere relies on zeolite, a cheap, abundant clay found in cat litter.

Stanford University researchers announced they had achieved record efficiencies in a promising class of new materials for solar cells — which can be thinner than a piece of paper.

Cities across the U.S. are exploring less damaging rock salt alternatives — and beet juice is one of the most promising.

Interest in Earthships, a type of off-the-grid home built from old tires, is picking up as people look for ways to live more sustainably.

To improve battery life and safety, while maintaining ionic conductivity, researchers aim to replace the liquids commonly used in batteries with a solid material made from trees.

Airseas, a French startup, has just revealed a prototype automated Seawing kite. It is fitted onto a giant Airbus cargo ship and is meant to reduce carbon emissions.

Scientists have invented an all-season smart-roof covering that keeps homes warm in the winter and cool in the summer. It uses a phase-shifting material that doesn’t require additional electricity.

OneZoom is an interactive “tree of life” that lets you explore the evolutionary connections between more than two million species.

If they work, solar-powered cars could be great for the environment. Here's the startups working to make that happen.