Surprising insights about debris flows on Mars

The period that liquid water was present on the surface of Mars may have been shorter than previously thought. Channel landforms called gullies, previously thought to be formed exclusively by liquid water, can also be formed ...

Physical theory describes movements of micro-hairs

They are only very simple structures, but without them we could not survive: Countless tiny hairs (cilia) are found on the outer wall of some cells, for example in our lungs or in our brain. When these micrometer-sized hairs ...

Power cuts and sleepless nights in China's record heatwave

The lights are out along a once-bustling boulevard in a tourist spot at the epicenter of China's hottest summer on record, as people take refuge indoors from the searing heat engulfing the country's southwest.

Music-making and the flow of aerosols

The latest research from the labs of Penn scientists Paulo Arratia and Douglas Jerolmack was an answer to "a call for help," says Arratia.

Research shows superior COVID protection from better face masks

New research from the University of Surrey and the University of Bristol has shown that FFP2 (filtering facepiece) respirator masks are five times more efficient at filtering particles that carry the COVID-19 virus than cloth ...

Butterfly effect can double travel of virus-laden droplets

Computer simulations have been used with great success in recent months to visualize the spread of the COVID-19 virus in a variety of situations. In Physics of Fluids, researchers explain how turbulence in the air can create ...

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