A bold new propulsion system, proposed by engineer Jim Woodward, suggests that it might be possible to escape Earth’s gravity ...

Piezoelectric crystals are a class of materials that exhibit a unique property called piezoelectricity. These crystals generate an electrical charge when subjected to mechanical stress or strain, and ...

The crystal in a crystal earpiece is a piezoelectric sound transducer. Back in the 1960s, these were fairly common in cheap transistor radios and hearing aids. Their sound fidelity isn’t very ...