If you search the outer reaches of the internet you will find all sorts of web sites and videos purporting to answer to free energy in the form of perpetual motion machines and other fantastical ...

Some bikes can harness the wind to make you faster, but what exactly does that mean, and how does the sail effect work?

The electric solar wind sail is a propulsion system that uses the solar wind proton flow as a source of momentum for spacecraft thrust. The momentum of the solar wind is transferred to the spacecraft ...

In one race of the Spring Soling Bowl off Annapolis in a dying northwesterly, we led up the second beat until nipped at the mark by Manfred Kantor, of Canada, who had come in from the right corner.