Live
- Nitish reaffirms his commitment to NDA, reiterates joining Mahagathbandhan was a mistake
- PKL Season 11: U Mumbai meet UP Yoddhas in opening clash of exciting second leg in Noida
- Cong divides people on caste & religion lines for political gains: Shahnawaz Hussain
- Pushpa-2: The Rule to Launch Grand Promotional Tour Across Seven Indian Cities
- Maha polls: Congress accuses BJP of pursuing ‘divide and cut’ policy to divert attention
- His currency supply has ended: Ashwini Choubey's jibe at Tejashwi
- Rahul Gandhi should feel ashamed, his ancestors did nothing for tribals: Babulal Marandi
- Avoid challenging constitutional institutions: VP Dhankhar
- Maha polls: BJP hurls questions at INDIA bloc amid Ulema Board's conditional support to MVA
- Regional rural banks must empower MSMEs via flagship govt schemes: FM Sitharaman
Scientists move closer to solving methane mystery on Mars
Scientists have taken an important step towards revealing the mysterious source of methane on Mars, by refining estimates of the gas in the Red Planet's atmosphere.
Scientists have taken an important step towards revealing the mysterious source of methane on Mars, by refining estimates of the gas in the Red Planet's atmosphere.
The methane puffing from a huge crater on Mars could be a sign of life or other non-biological activity under the planet's surface, according to researchers from Australian National University (ANU). Gale crater, which is 154 kilometres in diameter and about 3.8 billion years old, is thought by some to contain an ancient lakebed.
In the study published in Geophysical Research Letters journal, the team was able to improve the estimate of methane by using data from a satellite, ExoMars Trace Gas Orbiter and NASA's Mars Curiosity Rover, which collects rock, soil and air samples for onboard analysis. John Moores, an ANU Visiting Fellow based at York University in Canada, said scientists had been speculating for more than a decade as to what the source of methane on Mars could be.
"This new study redefines our understanding of how the concentration of methane in the atmosphere of Mars changes over time, and this helps us to solve the bigger mystery of what the source might be," said Moores. ANU Professor Penny King said there were several equally plausible explanations for the methane detected on Mars. "Some microbes on Earth can survive without oxygen, deep underground, and release methane as part of their waste," said King.
"The methane on Mars has other possible sources, such as water-rock reactions or decomposing materials containing methane," King said. Last year, scientists learned that methane concentrations changed over the course of the seasons with a repeatable annual cycle. "This most recent work suggests that the methane concentration changes over the course of each day," Moores said.
"We were able -- for the first time -- to calculate a single number for the rate of seepage of methane at Gale crater on Mars that is equivalent to an average of 2.8 kilogrames per Martian day," he said. The team was able to reconcile the data from the ExoMars Trace Gas Orbiter and the Curiosity Rover, which appeared to contradict each other with wildly different detections of methane.
