Frost Discovered on Top of Giant Mars Volcanoes

This handout photo obtained on June 10, 2024 courtesy of ESA shows a 3D model of the Olympus Mons volcano on Mars, as observed by the HRSC camera aboard ESA's Mars Express. (Photo by Adomas Valantinas / AFP)
This handout photo obtained on June 10, 2024 courtesy of ESA shows a 3D model of the Olympus Mons volcano on Mars, as observed by the HRSC camera aboard ESA's Mars Express. (Photo by Adomas Valantinas / AFP)
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Frost Discovered on Top of Giant Mars Volcanoes

This handout photo obtained on June 10, 2024 courtesy of ESA shows a 3D model of the Olympus Mons volcano on Mars, as observed by the HRSC camera aboard ESA's Mars Express. (Photo by Adomas Valantinas / AFP)
This handout photo obtained on June 10, 2024 courtesy of ESA shows a 3D model of the Olympus Mons volcano on Mars, as observed by the HRSC camera aboard ESA's Mars Express. (Photo by Adomas Valantinas / AFP)

Early morning frost has been detected on the peaks of massive volcanoes on Mars, an unexpected discovery about the dispersal of water on Mars that could one day prove essential for human exploration, scientists said.

The early morning frost was spotted in images taken by the European Space Agency's Trace Gas Orbiter, according to a study published in the journal Nature Geoscience.

The immense volcanoes are in the Tharsis plateau, an elevated region nearly 5,000 kilometers wide near the Martian equator.

The volcanoes have been extinct for millions of years. Among them is the largest volcano in the solar system, Olympus Mons, which is almost three times taller than Mount Everest.

The discovery came by chance -- no one expected to find frost in this region.

"We thought it was impossible for frost to form around Mars's equator," lead study author Adomas Valantinas said in a statement.

Plenty of sunshine and a thin atmosphere mean the temperature is relatively warm up there, "unlike what we see on Earth, where you might expect to see frosty peaks," the researcher at Brown University in the United States said in a statement.

There is also little water in the atmosphere near the Martian equator, making condensation less likely.

"Other space probes have observed frost but in wetter regions -- notably the northern plains," study co-author Frederic Schmidt of France's Paris-Saclay University told AFP.

The Trace Gas Orbiter, which has been orbiting Mars since 2018, was able to take images when the first rays of the Sun crossed over the tops of the volcanoes.

"We saw a shiny, blue deposit there, a particular texture that we only see in the early morning and during the cold seasons," Schmidt said.

The layer of the ice is only the thickness of a hair -- and it does not last long.

But there is about 150,000 tons of water -- equivalent to 60 Olympic swimming pools -- in the daily frost at the summits of volcanoes Olympus Mons, Arsia Mons, Ascraeus Mons and Ceraunius Tholus, the ESA said.

The researchers suggested the frost is caused by a micro-climate that forms inside the calderas of the huge volcanoes.

As wind whips up the sides of the volcanoes, it brings "relatively moist air from near the surface up to higher altitudes, where it condenses and settles as frost," study co-author Nicolas Thomas explained.

"We actually see this happening on Earth and other parts of Mars," said Thomas, who works on the Trace Gas Orbiter's imaging system.

Modelling how these frosts form "could allow scientists to reveal more of Mars's remaining secrets, including where water exists and how it moves between reservoirs," the ESA said.

This may prove crucial for planned missions that could see humans set foot on Martian soil.

"We could recover water from the frost for human consumption, or launch rockets from Mars by separating the oxygen and hydrogen molecules," Schmidt said.

Mapping the location of water on Mars -- which only exists as ice or vapor -- could also be key in the search for signs of extra-terrestrial life.

Liquid water is considered one of the essential ingredients for life on other planets.



Man Kills Grizzly Bear in Montana after it Attacks

FILE - US Highway 89 is shown near Gardiner, Mo., on July 15, 2020. (Brett French/Billings Gazette via AP)
FILE - US Highway 89 is shown near Gardiner, Mo., on July 15, 2020. (Brett French/Billings Gazette via AP)
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Man Kills Grizzly Bear in Montana after it Attacks

FILE - US Highway 89 is shown near Gardiner, Mo., on July 15, 2020. (Brett French/Billings Gazette via AP)
FILE - US Highway 89 is shown near Gardiner, Mo., on July 15, 2020. (Brett French/Billings Gazette via AP)

A 72-year-old man picking huckleberries in Montana shot and killed a grizzly bear after it attacked in a surprise encounter and injured him badly enough that he had to be hospitalized, authorities said Friday.
The man was alone on national forest land when the adult female charged him Thursday. He suffered significant injuries before killing the bear with a handgun, Montana Fish, Wildlife & Parks officials said.
The bear was likely reacting defensively to protect cubs, agency spokesperson Dillon Tabish said.
Wildlife workers set out game cameras in the area to try to confirm the presence of any cubs. If cubs are found, it's uncertain if they would be captured because it is difficult to find facilities qualified to take them, The Associated Press quoted him as saying.
“Depending on the age, we might leave them in the wild because they have a better chance of survival, rather than have to euthanize them,” Tabish said.
The attack happened on the Flathead National Forest about 2 miles (3.2 kilometers) north of Columbia Falls, a northwestern Montana city of about 5,500 people, according to the state wildlife agency.
The victim's name and further details on his condition were not released.
Meanwhile, Fish, Wildlife & Parks staff shot and killed an adult female grizzly Thursday after it had become accustomed to seeking out food from people and breaking into houses in and around Gardiner, a town of about 800 people just north of Yellowstone National Park.
Pet food, garbage and barbeque grills left outside and accessible to bears contributed to the problem, according to a department statement. No people were hurt by the bear before it was shot in the Yellowstone River.
Wildlife managers sometimes capture and move grizzly bears that are known to cause problems for people. But they will kill ones involved in predatory attacks on people or if they are deemed likely to keep causing problems regardless of being moved.