Virginia Tech engineers have designed an “ice slingshot” that can propel frozen disks of water across a flat, grooved surface without any external force.
Scientists say a breakthrough nanofabricated device is capable of sunlight-driven propulsion in one of the most difficult-to-reach parts of Earth's atmosphere.
A 13.3 billion-year-old black hole—the most distant ever discovered—has been observed by an international team of astronomers, providing new insights into the early universe.