Surface of Mars shows scars of glaciers just like Canada’s High Arctic: study

Surface of Mars shows scars of glaciers just like Canada’s High Arctic: study

Surface of Mars shows scars of glaciers just like Canada’s High Arctic: study

VANCOUVER — The deep valleys scarred into the surface of Mars under thick sheets of ice show that the planet once mirrored the Canadian High Arctic, says a new study.

Published Monday in the journal Nature Geoscience, the study says many of the valley networks carved into the surface of Mars were formed by water melting beneath glacial ice. It means there were fewer free-flowing rivers than previously thought.

Study author Anna Grau Galofre, a former University of British Columbia PhD student in the department of Earth, ocean and atmospheric sciences, said about 3.5 billion years ago the Martian surface looked like the surface of Canada 20,000 years ago.

“We’re talking about a planet that’s painted like a brother of Earth,” she said.

Grau Galofre and her team compared surface data of Mars with that of Devon Island in the Canadian Arctic.

The study describes Devon Island as a cold, dry, polar desert, where the glaciers and their retreat imitate what took place on Mars billions of years ago.

“Imagine ice sheets that are kilometres thick, really, really thick,” she said.

“If you were to just lift the ice sheet and see below, you would see a landscape. And this landscape is constituted of several different channels, expanded pathways like the plumbing of the ice.”

What this tells scientists is that while there may have been a warm and wet Mars on which there was rainfall, it’s far more likely that the planet’s surface resembled that of the Canadian Arctic, she said.

“It is like a time evolution of the climate that we’re looking at here. There were the warm and wet periods that talked about the oceans. And there were the cold and icy periods.”

This could mean that the climate on Mars either changed slowly through time from a cooler to a warmer period, or the other way around, she said.

The new findings brings up an “interesting discussion point” about life on Mars, Grau Galofre said.

“That’s actually not a bad thing in terms of an environment to sustain life.”

Lake Vostok on Antarctica is covered by a thick sheet of ice but has plenty of life, such as bacteria, she said.

“And they have been there for a long time, up to a million years, pretty much isolated by the ice sheet.”

The ice guarantees the creatures get water and also provides a stable environment, especially on a planet like Mars, which can have searing days and freezing nights, said Grau Galofre.

The ice sheet also protects life from solar radiation, she added.

The study could be expanded to include the Jezero Crater, where NASA’s Perseverance is scheduled to land on Mars because it may have once harboured life, she said.

Mars is the first and obvious place to start looking for life because it still has northern and southern ice caps, as well as a small fraction of water in the atmosphere, Grau Galofre said.

Evidence of water shows there is life or there was a time when life existed, she said.

“That’s a big step in terms of trying to answer this question — where are we coming from and are we alone in the universe,” Grau Galofre said.

“I think by finding life somewhere else in the universe we can also answer a lot about what is life and what are we doing here.”

This report by The Canadian Press was first published Aug. 4, 2020.

Hina Alam, The Canadian Press

Just Posted

Alberta is now below 3,000 active cases of COVID-19, as the province reported 2,639 Wednesday. (NIAID-RML via AP)
Red Deer below 100 active COVID-19 cases for first time since March

69.7 per cent of Albertans 12 and over have at least one dose of the COVID-19 vaccine

Premier Jason Kenney says the provincial government is doing everything it can to encourage Albertans to get vaccinated. (Photo by Chris Schwarz/Government of Alberta)
Travel prizes added to Alberta’s vaccine lottery

More than 40 travel rewards available for those who are fully vaccinated

Three calves were recently shot dead in Lacombe County near Mirror. (Photo from Facebook)
Calves shot and left for dead in central Alberta

Bashaw RCMP investigating three shootings

People line up to get their COVID-19 vaccine at a vaccination centre, Thursday, June 10, 2021 in Montreal. THE CANADIAN PRESS/Ryan Remiorz
Vaccines, low COVID case counts increase Father’s Day hope, but risk is still there

Expert says people will have to do their own risk calculus before popping in on Papa

The Calgary skyline is seen on Friday, Sept. 15, 2017. THE CANADIAN PRESS/Jeff McIntosh
2 deaths from COVID-19 Delta variant in Alberta, 1 patient was fully immunized

Kerry Williamson with Alberta Health Services says the patients likely acquired the virus in the hospital

A vial containing the Moderna COVID-19 vaccine is shown at a vaccination site in Marcq en Baroeul, outside Lille, northern France, Saturday, March 20, 2021. THE CANADIAN PRESS/AP/Michel Spingler
mRNA vaccines ‘preferred’ for all Canadians, including as 2nd dose after AstraZeneca: NACI

New recommendations prioritizes Pfizer, Moderna in almost all cases

House Majority Whip James Clyburn, D-S.C., center left, reaches over to Rep. Maxine Waters, D-Calif., joined by Speaker of the House Nancy Pelosi, D-Calif., center, and members of the Congressional Black Caucus as they celebrate the Juneteenth National Independence Day Act that creates a new federal holiday to commemorate June 19, 1865, when Union soldiers brought the news of freedom to enslaved Black people after the Civil War, at the Capitol in Washington, Thursday, June 17, 2021. It’s the first new federal holiday since Martin Luther King Jr. Day was created in 1983. (AP Photo/J. Scott Applewhite)
Biden to sign bill making Juneteenth a federal holiday

New American stat marks the nation’s end of slavery

A screenshot of the First Peoples Cultural Councils First Peoples’ Map. (First Peoples Cultural Council)
Online resource blends B.C.-Alberta’s Indigenous languages, art and culture

Advisor says initiative supports the urgent need to preserve Indigenous languages

A plane is silhouetted as it takes off from Vancouver International Airport in Richmond, B.C., May 13, 2019. THE CANADIAN PRESS/Jonathan Hayward
Report calls for airlines to refund passengers for flights halted due to COVID-19

Conclusion: federal help should be on the condition airlines immediately refund Canadian travellers

Green party Leader Annamie Paul speaks during a news conference on Parliament Hill in Ottawa on Tuesday, June 15, 2021. Paul has survived another day of party strife after a planned ouster shifted course, leaving her with a tenuous grip on power ahead of a likely federal election this year. THE CANADIAN PRESS/Justin Tang
Green Leader Annamie Paul blasts ‘racist,’ ‘sexist’ party execs who sought ouster

Fallout has continued, with two of the federal council’s members resigning

Russian President Vladimir Putin, left, and U.S President Joe Biden shake hands during their meeting at the ‘Villa la Grange’ in Geneva, Switzerland in Geneva, Switzerland, Wednesday, June 16, 2021. (AP Photo/Alexander Zemlianichenko, Pool)
Biden says meeting with Putin not a ‘kumbaya moment’

But U.S. president asserted Russian leader is interested in improved relations, averting a Cold War

Most Read