34 dust devils spotted on Mars in single image

ESA's Mars Express orbiter captured a striking image on December 7, 2024, revealing 34 dust devils swirling across the surface of Mars. The image, shared on June 17, 2026, shows the whirlwinds in the Mamers Valles region, a valley system in the planet's northern hemisphere. Though they appear as small light-colored dots with shadows, these Martian dust devils can reach heights of up to 5 miles (8 km) and span hundreds of yards in width.

Dust devils on Mars form similarly to those on Earth, as sunlight warms the ground, heating the thin layer of air above it. This warm air rises rapidly through cooler, denser air, creating a spiral around an area of low pressure. The image highlights the unique terrain of Mamers Valles, which includes ridges, plateaus, and small craters, as well as evidence of past geological activity such as water, ice, and lava flow.

The region is also home to mesas, cliffs, and debris-covered glaciers located at the base of steep slopes. These features suggest a complex history of erosion and sediment deposition. The image, available in a larger version, provides a rare opportunity to observe the frequency and scale of dust devils on Mars.

ESA encourages viewers to examine the image and attempt to identify all 34 dust devils. The image offers a fascinating look at the dynamic and ever-changing environment of the red planet, showcasing the natural forces that shape its surface.