Predicting the morphodynamics of sedimentary landscapes due to fluvial and aeolian flows
requires answering the following questions: Is the flow strong enough to initiate sediment …

Earth's surface is composed of a staggering diversity of particulate–fluid mixtures: dry to wet,
dilute to dense, colloidal to granular and attractive to repulsive particles. This material variety …

The physics above and below the yield stress is unified by a simple model for viscoplasticity
that accounts for the nonlinear rheology of multiple yield stress fluids. The model has a rate …

A landscape's sediment grain size distribution is the product of, and an important influence
on, earth surface processes and landscape evolution. Grains can be large enough that the …

Dysphagia is a condition that particularly affects the elderly, making dietary modification an
essential treatment strategy. This involves using various thickened foodstuffs, which must be …

Soil creeps imperceptibly but relentlessly downhill, sha** landscapes and the human and
ecological communities that live within them. What causes this granular material to 'flow'at …

We review the experimental synthesis of smooth and rough particles, characterization of
surface roughness, quantification of the pairwise and bulk friction coefficients, and their …

Rate‐and state‐dependent friction (RSF) equations are commonly used to describe the time‐
dependent frictional response of fault gouge to perturbations in sliding velocity. Among the …

Like faults, landslides can slip slowly for decades or accelerate catastrophically. However,
whereas experimentally derived friction laws provide mechanistically based explanations for …

Climate change is causing increasingly widespread, frequent, and intense wildfires across
the western United States. Many geomorphic effects of wildfire are relatively well studied, yet …