1. A new study highlights the threat of nearly invisible comets to Earth. 2. These dark comets do not exhibit outgassing, making them difficult to detect. 3. NASA and other agencies need to develop programs to discover such rogue objects.

➀ The Helmholtz Institute Freiberg for Resource Technology and the Center for Advanced Systems Understanding have conducted tests to create a conceptual framework for an autonomous swarm with a specific mission. The swarm is designed to efficiently scan irregularly structured environments. ➁ The research aims to improve economic prosperity, social development, and environmental protection through the use of drones. ➂ The proposed system is more resilient to failures and can recover quickly. It has been tested both in virtual and real drone swarms, demonstrating its reliability and performance.

➀ Scientists have developed a method using elliptical micropillars to enhance the generation and detection of coherent acoustic phonons in the gigahertz range. ➁ This advancement addresses the challenge of controlling hypersound at the nanoscale and could revolutionize optophononic technologies. ➂ The technique leverages the unique properties of elliptical micropillars to achieve optimal conditions for both phonon generation and detection, promising applications in quantum communication and data processing.