Viscosity is a fundamental property that determines how easily a material flows, affecting systems from industrial materials to the Earth's deep interior. Yet, scientists have rarely considered whether viscosity has an upper limit because high-viscosity materials are usually rock-forming minerals outside fluid dynamics studies. Now, a Japanese researcher has combined Earth observations, laboratory experiments, and numerical simulations to estimate a physically meaningful upper viscosity bound of 10^30±2 Pa s, with implications for geophysics and materials.

Researchers are sharing lessons from the unprecedented Stanley Park coyote attacks from 2020 to 2021 to help people better coexist with urban wildlife. 

Coyotes are here to stay, say authors of a new study which examined contributing factors to nine months of aggressive coyote encounters that resulted in a cull of 11 coyotes in Vancouver’s largest urban park. 

Nathan Lewis, a UBC zoology doctoral candidate, and Dr. Sarah Benson-Amram, an associate professor in the UBC departments of zoology and forest and conservation sciences, discuss how people across North America can live in harmony with their four-legged neighbours. 

Researchers at the University of Osaka have used machine learning to develop a systematic framework for structural descriptors in supercooled water. A neural network model was used to quantitatively assess the performance of 16 structural descriptors in differentiating between two states of water, a high-density liquid and a low-density liquid. The framework could be used to further our understanding of the anomalous behavior of water.