A screengrab from animation of the Martian poles with ice caps. The only way we can put life on the planet in the future is to ensure without a doubt that there had been no life on it in the past.
Lake beds like those explored by Nasa's Curiosity rover show water was present on the surface of Mars in the past.
All of that water is either locked up in solid form, however, or locked away in the distant past. This was taken up by Percival Lowell, who used the idea of canals to promote the idea in his book Mars and its Canals(1906) that there was a vast and lush ecosystem on Mars, complete with life intelligent enough to make planet-spanning canals to take water from the poles to irrigate canals.
"This subsurface anomaly on Mars has radar properties matching water or water-rich sediments", says Roberto Orosei, principal investigator of the MARSISexperiment and lead author of the paper published in the journal Science today. The study area is highlighted using a THEMIS IR image mosaic.
Bramson said better understanding of the water ice layers and sequestered carbon dioxide in the south polar cap of Mars, which affect radar signals, could help clarify what lies below the surface. USGS Astrogeology Science Center, Arizona State University, ESA, INAF.
Between March 2012 and December 2015, the researchers got 29 sets of radar readings from Mars's Planum Australe, the southern polar plain.
The body of water is about 12.5 miles across and sequestered beneath almost a mile of ice at the south pole.
"All the technology to drill through this ice to the lake doesn't exist yet so it will probably take at least another 25 years before we will be examining this".
Salts in the lake are believed to have kept the water - which has a temperature as low as -68C (-90F) - from freezing over.
The proposed "lake" sits beneath the planet's south polar ice cap, and is about 20km (12 miles) across. An underground lake was found near here. "This is something that is to us the tell tale sign of the presence of water", Prof Orosei said.
So the researchers did a rough calibration by registering the signal that bounced back when the radar hit the atmosphere/dusty ice boundary at the Martian surface, since the composition of these materials is pretty well understood.
"It sticks out like a sore thumb in the radar data", she said. The brightest reflections are centered around 193 degrees E/81 degrees S in the intersecting orbits, outlining a well-defined, 20 km-wide zone. The radar cross section has been tilted 90°. The blue triangle indicates an area of very high reflectivity, interpreted as being caused by the presence of a reservoir of water, about a mile below the surface. It was the first-ever radar sounder brought to another planet, but the team was unable to determine if it detected water on Mars until now. With the stunning findings, that debate is likely to be put to bed.
The question would be, Orosei added, whether any life forms that could have evolved long ago on Mars have found a way to survive until now. Researchers have also likened the discovery to Antarctica's Lake Vostok. "This is certainly not a very pleasant environment for life ..."
According to early hypotheses, however, the lake is most likely too cold and salty to sustain any sort of life. It is about 20 km across, say the researchers in a release.
Taiwan's cabinet spokeswoman Kolas Yotaka called China's behaviour "unjust" and asked for support from the worldwide community. A check of American Airlines' website showed it now listed only Taipei's airport code and city, but not the name Taiwan.
Bloys also revealed that HBO is only going forward with one of the five Game of Thrones prequel series that were in the works. The final season of Game of Thrones doesn't have an official return date yet, but the final six episodes will air in 2019.
The Department of Justice released hundreds of pages of redacted documents last week from the applications for the warrants. But Democrats at the time contended that the court had been told that the research had politically motivated origins.
House of Representatives has introduced articles of impeachment against Deputy Attorney General Rod Rosenstein . Democrats have argued the focus on Rosenstein is an attempt to broadly undermine the Mueller investigation.
To date, every time that the Trump administration has imposed a tariff on China, China has imposed an equal tariff on US goods. Officials say they will be using a depression-era program, the Commodity Credit Corporation, to secure money from the U.S.
We were being nice - until now! Juncker said the European Union "can import more soybeans from the USA , and it will be done". Trump is meeting Wednesday with European Commission President Jean-Claude Juncker (zhahn-KLOHD' YUN'-kur).
He tells Trump , "I need to open up a company for the transfer of all that info regarding our friend David". ABC News has obtained the secret audio recording between Donald Trump and his attorney Michael Cohen .
In 1994, Marchionne joined Alusuisse Lonza Group Ltd. after the Swiss chemical and pharmaceutical company acquired Lawson. In 2009, he presided over Fiat's merger with Chrysler , which was then the number three carmaker in the US.
Trump lawyer Rudy Giuliani has said the proposed payment was a personal matter and not subject to campaign finance law. In May, President Trump admitted he had reimbursed Mr Cohen for a payment he made to hush up her claims.
Almost 10.6 crore people are registered to vote for members of the lower house of parliament and four provincial assemblies. According to the latest opinion polls, neither Mr Khan nor Mr Sharif are likely to win a clear majority in the election.
Vettel needs to bounce back strongly at the Hungarian GP next weekend, or Hamilton will take the momentum into the summer break. Team principal Toto Wolff has denied that team orders will be the norm for the rest of Mercedes' 2018 season.
The biggest news from the Trump-Juncker meeting is that it appears to have delayed an impending trade war over autos. Mr Juncker added he had travelled to Washington with "the intention to make a deal today and we made a deal today".
PT to a medical emergency call on the 8000 block of Laurel View Drive in Hollywood Hills , a department spokeswoman said . In the wake of her hospitalisation, the singer's Atlantic City concert, set to take place tomorrow, has been cancelled.
Democratic Senate leader opposes more meetings between USA and Russian Federation until summit details are known. The poll found that 64 percent of USA adults believe Trump is not tough enough on Russian Federation .
In a statement on Monday, Spencer apologised for the "ridiculously ugly episode" but he initially refused to step down. Who is America? airs on Showtime in the USA and on Mondays at 10pm on Channel 4 in the UK.
Ozil, who was born in Germany to Turkish-origin parents, said he felt "racism and disrespect" - pointing the finger at German football authorities - in his no-holds-barred statement released over the weekend.
Manchester City have been linked with a £72m move for the 28-year-old Bosnia worldwide after missing out on Jorginho to Chelsea . City manager Guardiola, however, could not be prouder of the record-setting Premier League champions post-match.
According to the U.S. embassy spokesperson, the only person injured was the individual who detonated the explosive device. An explosion has taken place outside the US Embassy in Beijing , eyewitnesses have said.
This will be a historical eclipse as it will last three hours and 55 minutes, making it the longest eclipse of this century. As the Moon continues on its orbit, and pulls away from the Umbra, stargazers will notice another partial lunar eclipse.
He is under investigation by federal prosecutors in Manhattan over payments he made to women who allegedly had affairs with Trump. The recordings were handed over to the government on Friday, the retired judge overseeing the review, said in her one-page order.
Manchester United finished in second place in the Premier League table last season to finish above Spurs and Liverpool FC. And according to TransferMarketWeb , Manchester United are trying to woo him to Old Trafford.
Authorities in central Iowa are still searching for a University of Iowa student who went missing earlier this week. Authorities have spent the past five days combing every field, barn, shed and building near the missing girl's home.
In a clip from " Who Is America? ". "If they do a good job, maybe I'll send them a thank-you note", Arpaio said. Ex-Republican congressman-turned-radio host Joe Walsh also throws his weight behind Morad.
Burnt-out cars were scattered outside gated compounds where three- and four-storey buildings bore signs of fire damage. Some householders took up hosepipes to douse the fires while police assisted with the evacuation of some areas.