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…

Study suggests rings offer long term picture other technologies can’t — ScienceDaily

Satellite imagery, carbon dioxide measurements, and computer models all help scientists understand how climate and carbon dynamics are changing in the world’s forests. But the technology powering these high-tech data only stretches back about thirty years, limiting our picture of long-term change. A new study in Nature Communications by scientists from the Harvard Forest, Columbia…

The sneaky way estrogen drives brain metastasis in non-estrogen-dependent breast cancers — ScienceDaily

Triple-negative breast cancers are more likely than other breast cancer types to metastasize and are especially likely to go the brain in younger women. Researchers have tested various hypotheses to explain this danger. One idea that has gotten little attention is the thought that estrogen might be to blame. After all, triple negative breast cancers…