A new study indicates that conditions on Mars nearly four billion years ago made life on the Red Planet more likely than previously thought.
The paper, published in Nature Geoscience on Monday, dispels the commonly held view that Mars was warm and wet, and once featured rivers, rainfall and oceans. It shows that a large number of the valley networks on the planet's surface were carved by water melting beneath glacial ice, not by free-flowing rivers as has previously been believed.
Researchers developed and used new techniques to examine more than 10,000 Martian valleys, using an algorithm to infer their underlying erosion processes.
Climate modelling predicts that Mars' ancient climate was much cooler
The paper’s lead author, Dr Anna Grau Galofre, former PhD student in the department of earth, ocean and atmospheric sciences at the University of British Columbia, said the findings of the study helped explain how the valleys would have formed 3.8 billion years ago on a planet that is farther from the sun than Earth, at a time when the sun’s heat was less intense.
"Climate modelling predicts that Mars' ancient climate was much cooler during the time of valley network formation," said Dr Grau Galofre.
The authors say that these environments would also have supported better survival conditions for possible ancient life on Mars. A sheet of ice would lend more protection and stability for underlying water, as well as providing shelter from solar radiation in the absence of a magnetic field - something that Mars once did have but which disappeared billions of years ago.
"For the last 40 years, since Mars's valleys were first discovered, the assumption was that rivers once flowed on Mars, eroding and originating all of these valleys," Dr Grau Galofre said.
"But there are hundreds of valleys on Mars, and they look very different from each other. If you look at Earth from a satellite, you see a lot of valleys: some of them made by rivers, some made by glaciers, some made by other processes, and each type has a distinctive shape. Mars is similar, in that valleys look very different from each other, suggesting that many processes were at play to carve them."
Co-author Mark Jellinek, professor in the University of British Columbia’s department of earth, ocean and atmospheric sciences, said the results provided the first evidence of extensive subglacial erosion driven by channelised meltwater drainage beneath an ancient ice sheet on Mars.
"The findings demonstrate that only a fraction of valley networks match patterns typical of surface water erosion, which is in marked contrast to the conventional view,” he said.
The scientists found “striking similarities” between many Martian valleys and those in the Canadian Arctic Archipelago after comparing their subglacial channels.
"Devon Island [in Canada] is one of the best analogues we have for Mars here on Earth - it is a cold, dry, polar desert, and the glaciation is largely cold-based," another co-author, Gordon Osinski, professor in Western University's department of earth sciences and Institute for Earth and Space Exploration, said.
Although the research is focused on Mars, scientists believe that the same techniques can be applied to uncover more about the early history of our own planet.
"Currently, we can reconstruct rigorously the history of global glaciation on Earth going back about a million to five million years," says Prof Jellinek. "Anna's work will enable us to explore the advance and retreat of ice sheets back to at least 35 million years ago - to the beginnings of Antarctica, or earlier - back in time well before the age of our oldest ice cores.”
The UAE made history on July 20, after it launched its first mission to Mars in efforts to study the dynamic weather conditions of the planet.
The team behind the project was invited to the palace and were honoured by Sheikh Mohamed and Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai.
Green ambitions
- Trees: 1,500 to be planted, replacing 300 felled ones, with veteran oaks protected
- Lake: Brown's centrepiece to be cleaned of silt that makes it as shallow as 2.5cm
- Biodiversity: Bat cave to be added and habitats designed for kingfishers and little grebes
- Flood risk: Longer grass, deeper lake, restored ponds and absorbent paths all meant to siphon off water
What can victims do?
Always use only regulated platforms
Stop all transactions and communication on suspicion
Save all evidence (screenshots, chat logs, transaction IDs)
Report to local authorities
Warn others to prevent further harm
Courtesy: Crystal Intelligence
Killing of Qassem Suleimani
Breast cancer in men: the facts
1) Breast cancer is men is rare but can develop rapidly. It usually occurs in those over the ages of 60, but can occasionally affect younger men.
2) Symptoms can include a lump, discharge, swollen glands or a rash.
3) People with a history of cancer in the family can be more susceptible.
4) Treatments include surgery and chemotherapy but early diagnosis is the key.
5) Anyone concerned is urged to contact their doctor
Ain Dubai in numbers
126: The length in metres of the legs supporting the structure
1 football pitch: The length of each permanent spoke is longer than a professional soccer pitch
16 A380 Airbuses: The equivalent weight of the wheel rim.
9,000 tonnes: The amount of steel used to construct the project.
5 tonnes: The weight of each permanent spoke that is holding the wheel rim in place
192: The amount of cable wires used to create the wheel. They measure a distance of 2,4000km in total, the equivalent of the distance between Dubai and Cairo.
'Worse than a prison sentence'
Marie Byrne, a counsellor who volunteers at the UAE government's mental health crisis helpline, said the ordeal the crew had been through would take time to overcome.
“It was worse than a prison sentence, where at least someone can deal with a set amount of time incarcerated," she said.
“They were living in perpetual mystery as to how their futures would pan out, and what that would be.
“Because of coronavirus, the world is very different now to the one they left, that will also have an impact.
“It will not fully register until they are on dry land. Some have not seen their young children grow up while others will have to rebuild relationships.
“It will be a challenge mentally, and to find other work to support their families as they have been out of circulation for so long. Hopefully they will get the care they need when they get home.”
UAE currency: the story behind the money in your pockets
The story of Edge
Sheikh Mohamed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the Armed Forces, established Edge in 2019.
It brought together 25 state-owned and independent companies specialising in weapons systems, cyber protection and electronic warfare.
Edge has an annual revenue of $5 billion and employs more than 12,000 people.
Some of the companies include Nimr, a maker of armoured vehicles, Caracal, which manufactures guns and ammunitions company, Lahab
Quick%20facts
%3Cul%3E%0A%3Cli%3EStorstockholms%20Lokaltrafik%20(SL)%20offers%20free%20guided%20tours%20of%20art%20in%20the%20metro%20and%20at%20the%20stations%3C%2Fli%3E%0A%3Cli%3EThe%20tours%20are%20free%20of%20charge%3B%20all%20you%20need%20is%20a%20valid%20SL%20ticket%2C%20for%20which%20a%20single%20journey%20(valid%20for%2075%20minutes)%20costs%2039%20Swedish%20krone%20(%243.75)%3C%2Fli%3E%0A%3Cli%3ETravel%20cards%20for%20unlimited%20journeys%20are%20priced%20at%20165%20Swedish%20krone%20for%2024%20hours%3C%2Fli%3E%0A%3Cli%3EAvoid%20rush%20hour%20%E2%80%93%20between%209.30%20am%20and%204.30%20pm%20%E2%80%93%20to%20explore%20the%20artwork%20at%20leisure%3C%2Fli%3E%0A%3C%2Ful%3E%0A
What the law says
Micro-retirement is not a recognised concept or employment status under Federal Decree Law No. 33 of 2021 on the Regulation of Labour Relations (as amended) (UAE Labour Law). As such, it reflects a voluntary work-life balance practice, rather than a recognised legal employment category, according to Dilini Loku, senior associate for law firm Gateley Middle East.
“Some companies may offer formal sabbatical policies or career break programmes; however, beyond such arrangements, there is no automatic right or statutory entitlement to extended breaks,” she explains.
“Any leave taken beyond statutory entitlements, such as annual leave, is typically regarded as unpaid leave in accordance with Article 33 of the UAE Labour Law. While employees may legally take unpaid leave, such requests are subject to the employer’s discretion and require approval.”
If an employee resigns to pursue micro-retirement, the employment contract is terminated, and the employer is under no legal obligation to rehire the employee in the future unless specific contractual agreements are in place (such as return-to-work arrangements), which are generally uncommon, Ms Loku adds.
Manchester City (0) v Liverpool (3)
Uefa Champions League, quarter-final, second leg
Where: Etihad Stadium
When: Tuesday, 10.45pm
Live on beIN Sports HD
Labour dispute
The insured employee may still file an ILOE claim even if a labour dispute is ongoing post termination, but the insurer may suspend or reject payment, until the courts resolve the dispute, especially if the reason for termination is contested. The outcome of the labour court proceedings can directly affect eligibility.
- Abdullah Ishnaneh, Partner, BSA Law
One in nine do not have enough to eat
Created in 1961, the World Food Programme is pledged to fight hunger worldwide as well as providing emergency food assistance in a crisis.
One of the organisation’s goals is the Zero Hunger Pledge, adopted by the international community in 2015 as one of the 17 Sustainable Goals for Sustainable Development, to end world hunger by 2030.
The WFP, a branch of the United Nations, is funded by voluntary donations from governments, businesses and private donations.
Almost two thirds of its operations currently take place in conflict zones, where it is calculated that people are more than three times likely to suffer from malnutrition than in peaceful countries.
It is currently estimated that one in nine people globally do not have enough to eat.
On any one day, the WFP estimates that it has 5,000 lorries, 20 ships and 70 aircraft on the move.
Outside emergencies, the WFP provides school meals to up to 25 million children in 63 countries, while working with communities to improve nutrition. Where possible, it buys supplies from developing countries to cut down transport cost and boost local economies.
PROFILE OF HALAN
Started: November 2017
Founders: Mounir Nakhla, Ahmed Mohsen and Mohamed Aboulnaga
Based: Cairo, Egypt
Sector: transport and logistics
Size: 150 employees
Investment: approximately $8 million
Investors include: Singapore’s Battery Road Digital Holdings, Egypt’s Algebra Ventures, Uber co-founder and former CTO Oscar Salazar
Final results:
Open men
Australia 94 (4) beat New Zealand 48 (0)
Plate men
England 85 (3) beat India 81 (1)
Open women
Australia 121 (4) beat South Africa 52 (0)
Under 22 men
Australia 68 (2) beat New Zealand 66 (2)
Under 22 women
Australia 92 (3) beat New Zealand 54 (1)
Dhadak 2
Director: Shazia Iqbal
Starring: Siddhant Chaturvedi, Triptii Dimri
Rating: 1/5
UPI facts
More than 2.2 million Indian tourists arrived in UAE in 2023
More than 3.5 million Indians reside in UAE
Indian tourists can make purchases in UAE using rupee accounts in India through QR-code-based UPI real-time payment systems
Indian residents in UAE can use their non-resident NRO and NRE accounts held in Indian banks linked to a UAE mobile number for UPI transactions
