Method could simplify process of designing Helmholtz resonators — ScienceDaily

Noise-cancelling headphones have become a popular accessory for frequent flyers. By analyzing the background frequencies produced by an airplane in flight and generating an “anti-noise” sound wave that is perfectly out of phase, such headphones eliminate disturbing background sounds. Although the headphones can’t do anything about the cramped seating, they can make watching a film…

Diversification after mass extinction — ScienceDaily

A team led by Ludwig-Maximilians-Universitaet (LMU) in Munich paleontologist Adriana López-Arbarello has identified three hitherto unknown fossil fish species in the Swiss Alps, which provide new insights into the diversification of the genus Eosemionotus. Monte San Giorgio in the Swiss canton of Ticino is one of the most important known sources of marine fossils from…