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Home»Lifestyle»NASA rover watches two ‘dust devils’ collide on Mars in awesome new footage
Lifestyle

NASA rover watches two ‘dust devils’ collide on Mars in awesome new footage

EditorBy EditorApril 8, 2025No Comments4 Mins Read
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NASA’s Perseverance rover recently had a front-row seat to a rare case of Martian cannibalism: It filmed a massive, swirling “dust devil” engulfing a smaller twister on the Red Planet.

The roaming robot captured the epic encounter on Jan. 25, on the 1,399th sol (Martian day) of its mission. In the video, a smaller devil, which is barely visible in the images, follows in the wake of a larger twister (moving from left to right), before getting too close and being sucked into the larger vortex. The rover was around 0.6 mile (1 kilometer) from the pair when this happened.

The larger devil is estimated to measure around 210 feet (65 meters) wide, while the smaller cone appears to be just 16 feet (5 m) across. It is unclear how tall they were as they were cut off by the rover’s field of view. However, a dust devil previously filmed by Perseverance — and with a width almost identical to the larger devil — was predicted to be around 1.2 miles (2 km) tall, or around five times taller than the Empire State Building.

“Convective vortices — aka dust devils — can be rather fiendish,” Mark Lemmon, a Perseverance senior research scientist with the Space Science Institute in Boulder, Colorado, said in a NASA statement. “These mini-twisters wander the surface of Mars, picking up dust as they go and lowering the visibility in their immediate area.”

Related: Listen to a Martian dust storm engulf the Perseverance rover in eerie, world-first audio recording

A black and white image of the surface of Mars with a small twister on the horizon (circled)

This dust devil photographed by Perseverance on Aug. 30, 2023 was the same width as the larger twister in the new video and was estimated to be around 1.2 miles tall. (Image credit: NASA/JPL-Caltech)

It is very rare for two dust devils to collide with one another, but when it happens, there are two possible outcomes: “If two dust devils happen upon each other, they can either obliterate one another or merge, with the stronger one consuming the weaker,” Lemmon said.

“If you feel bad for the little devil in our latest video, it may give you some solace to know the larger perpetrator most likely met its own end a few minutes later,” he added. “Dust devils on Mars only last about 10 minutes.”

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The largest devil was likely spinning at a max speed of more than 10 mph (16 km/h), based on data collected from previous sightings.

Martian dust devils

Dust devils are formed by warm air rising from the planet’s sun-heated surface. As the air rises, cooler air rushes down to replace it, which is then heated and rises again. This cycle creates a column of rising air that starts to spin increasingly quickly. This phenomenon also occurs on Earth, though the results are usually far less dramatic.

“When the incoming air rises into the column, it picks up speed like a spinning ice skater bringing their arms closer to their body,” NASA representatives wrote in the statement. “The air rushing in also picks up dust, and a dust devil is born.”

A computer generated image of two twisters on Mars

Dust devils are responsible for around half of the dust suspended in Mars’ atmosphere. (Image credit: Getty Images)

When the new video was taken, Perseverance was deliberately scouring the horizon in search of the spinning devils to help gather data that can help researchers learn more about this phenomenon.

“Dust devils play a significant role in Martian weather patterns,” Katie Stack Morgan, a project scientist for the Perseverance rover at NASA’s Jet Propulsion Laboratory in Pasadena, California, said in the statement.

Studying them is important because “these phenomena indicate atmospheric conditions, such as prevailing wind directions and speed, and are responsible for about half the dust in the Martian atmosphere,” she added.

NASA’s Viking orbiters captured the first-ever images of Martian dust devils in the 1970s, as the spacecraft spied the swirling structures from space.

However, Perseverance has captured some of the best videos of these mini-twisters, including a swarm of around a dozen funnels in July 2021. The rover also captured the first audio recording of a Martian dust devil in September 2021.

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