
Acoustic frequency filters, which convert electrical signals into miniaturized sound waves, separate the different frequency bands for mobile…

Acoustic frequency filters, which convert electrical signals into miniaturized sound waves, separate the different frequency bands for mobile…
![[Translate to English:] Migranten sitzen auf der Bahnhofstreppe am Kölner Hauptbahnhof.](/fileadmin/_processed_/2/c/csm_imago84644934_IMAGO_Future_Image_62269f56d7.jpeg)
The concept of Inclusion is on everyone's lips, but how can we enable refugees to participate in everyday life, the labour market and education?…



The idea of dispersing sulphur particles in the atmosphere to cool the Earth sounds adventurous, but it is being discussed. However, geoengineering is…