Heidelberg University

Scientists have created “acoustic holograms” that can assemble matter into 3D objects, using just sound. The technique works with various types of particles and even living cells, allowing for a new kind of 3D printing that’s fast and contact-free.

The analysis of volcanic gases allows scientists to determine what processes are taking place deep within volcanoes. And while big, expensive drones have previously been used to sample those gases, a small consumer model can now do the job.