Duncan Mitchell

Onymacris plana male sprinting after female. Photo Joh Henschel, Author provided (no reuse)

January 7, 2026

A Namib desert beetle runs to stay cool: how scientists solved the puzzle of this unique and speedy species

Duncan Mitchell, University of the Witwatersrand and Joh R. Henschel, University of the Free State

A Namibian desert beetle cools down by running in the sun.

A security guard checks the body temperature of a motorcyclist as a preventive measure. Risa Krisadhi/SOPA Images/LightRocket via Getty Images

June 15, 2020

Andrea Fuller, University of the Witwatersrand and Duncan Mitchell, University of the Witwatersrand

Detecting fever requires measuring core body temperature. Screening measures the body’s surface temperature.

Keeping office workers from feeling too hot or too cold is no simple task. Kjetil Kolbjornsrud/Shutterstock

August 3, 2015

Shane Maloney, The University of Western Australia; Andrea Fuller, University of the Witwatersrand, and Duncan Mitchell, The University of Western Australia

If you work in an office, chances are you or the person sitting next to you has grumbled about it being too hot or cold.

Women often report that they feel colder than men in the same environment. Garry Knight/Flickr

March 8, 2015

Duncan Mitchell, The University of Western Australia; Andrea Fuller, University of the Witwatersrand, and Shane Maloney, The University of Western Australia

Fever indicates a problem, but is there anything wrong with feeling excessively cold rather than actually being cold?