Thorsten Pöschel berichtet im 237. Podcast der Welt der Physik über granulare Materie.
PhD defense by Nikola Topic
PhD defense by Lídia Almazán Torres
PhD defense by Severin Strobl
The cover picture shows an outflowing hourglass and its different regimes. Detailed information can be found in the publication „Weight of an Hourglass – Theory and Experiment in Quantitative Comparison„