Further evidence has emerged that Mars still has some liquid water

Scientists analysing images of Mars have found even more signs that, in rare circumstances, Mars may have water flowing across its surface.

Mars is supposed to be a dead, dry planet. There are clear signs that liquid water used to flow across its surface - remember Nasa mocking up that video of the Mars of 3.7 billion years ago? - but one of the Curiosity rover’s jobs right now is to investigate what we take to be ancient river bed.

This makes it very surprising indeed that scientists saw dark, water-like streaks in the red dust, in 2011. This should not be happening on a planet with no atmosphere.

To be clear, this isn’t proof that there’s liquid water on Mars - it’s just that we’ve seen something that looks a heck of a lot like liquid water. Here’s a slideshow of eight images showing what we’re talking about, provided by Nature:

Those black lines, as spotted by the Mars Reconnaissance Orbiter, are known as “recurring slope lineae”, and they darken the Martian soil just as water darkens soil on Earth. They were originally found two years ago at seven sites in the highlands of southern Mars, at middle latitudes which warm up in the summer and freeze again in the winter.

This latest study, by the same team of planetary scientists led by Alfred McEwen of the University of Arizona in Tucson, has found a further 12 sites with streaks, all on or near the equator. The equator has roughly the same temperatures year-round, and that means that - if there’s liquid water flowing on the surface - there must be a mechanism in place to replenish it. Mars’ low atmospheric pressure means that liquid water on the surface should sublimate into a gas almost immediately.

We now know that there’s quite a lot of water on Mars, be it frozen on the surface at the poles, under the surface elsewhere on the planet, or bound up with the soil itself. The implication of a flowing water source is that it might be the most likely location of life that still exists on Mars - but, conversely, that also makes it more crucial that we don’t send improperly sterilised probes there. If those Earth microbes are to survive anywhere on Mars - and scientists recently discovered a whole new species of microbe that could survive in even the most sterile of spaceship construction labs - then they’ll survive on these slopes.

It's also exciting for future colonists, who will save on energy if they don't have to heat up ice for drinking water. Our best chance of figuring out the exact nature of these lines on Mars is from afar, with the Mars Reconnaissance Orbiter, until we can decide what further action to take. Perhaps even the first colonisers, whoever they be (maybe it'll be Mars One, who want to send people there on a one-way mission starting from 2024) will be able to take advantage of that water source.

Dark streaks on Mars that may be water. (Image: NASA/JPL-Caltech/U. of Arizona)

Ian Steadman is a staff science and technology writer at the New Statesman. He is on Twitter as @iansteadman.

Author's own
Show Hide image

Facebook official: the rise and fall of the relationship status

In the Noughties, it was a relationship milestone. Now, it's just another dead feature. What happened? 

In the 1950s, couples on US campuses took out ads in college newspapers to announce that their relationship was getting serious. 

In the Noughties, we had Facebook official. One of the social media site's first features, rolled out while the network was still primarily used by students at US universities, was the "relationship status". And at first, it was a successful one: a way for users to broadcast their personal lives to friends and ex-lovers, and another way to show off online.

It was so successful, in fact, that it began to invade very culture and lexicon of dating. "It's Complicated" was first entered onto Urban Dictionary in 2007, and fast became an iconic phrase to describe the rocky dating lives of teens and twentysomethings. (Whether anyone actually used it on their profile without a hint of irony is another question.)

The press treated Facebook and its investment in your relationships much as it's treating dating apps now: with suspicion. News and comment pieces were littered with first-person horror stories of "likes" and passive aggressive comments on break-up statuses, or people mercilessly dumping their partners by declaring themselves "single". 

But these criticisms actually show how influential the statuses were - enough to be seen as a threat to the social fabric. As Samuel Axon wrote for Mashable in 2010 in an article titled "5 Ways Facebook Changed Dating (For the Worse)": 

"Changing Facebook relationship status has, for better or worse, joined first date, first kiss, first night together, exclusivity talk, and first "I love you" on the list of important relationship milestones."

Breaking up  

In 2016, we can pretty much declare the relationship status dead - at least among the twenty-something generation who grew up on Facebook. In November, BuzzFeed ran a reader poll and concluded: “No One Wants To Admit They’re In A Relationship On Facebook Anymore”. Forty per cent of polled twenty-somethings said they wouldn’t put a relationship status on Facebok. 

Among twentysomethings I spoke to anecdotally, the percentage was even higher: I couldn't find a single person who would list themselves as "in a relationship" with a boyfriend or girlfriend. The situation changed a little when it came to engagements or marriage: these are worth listing alongside other big milestones like graduations so friends know what you're up to. But what turned us off listing our squeezes in real-time?

One obvious answer is that everyone tries it once, in the first flush of romance, then never forgets the crushing social embarrassment of living out your break-up online. Izzy, 23, tells me that she once saw "Facebook official" as a necessary stage in relationships, but now, "I'd probably only change it now for something big like an engagement or marriage", since watching break-up become "public property" on Facebook. 

In “Why I will never (again) put my relationship status on Facebook” at XO Jane, Sofia Barrett-Ibarria recounts that colleagues and friends would approach her following a a break-up and subsequent status change: “Thanks to Facebook, everyone I knew knew about the breakup. This was my nightmare.” 

In the essay, and among those I talk to, there's a real sense that a social media airing of a break-up actually makes it worse. It's no wonder we're keen to avoid repeating the experience. 

Instead, it's far more common among my generation to list a joke partner online - as much to protect yourself from the risky business of online relationship declarations as to make fun of the feature itself. Amy, 24, says her Facebook relationship with a friend “became quite useful as a means to avoid putting other relationships on here”. It's a joke, but it's also a signal that you won't be game for a po-faced "in a relationship" further down the line. 

Even the phrase "relationship status" has become a meme to mock your own singledom, rather than a serious phrase about your commitment to someone:

It's not you, it's me 

Marking the slow decline of the relationship statuses are various desperate attempts by Facebook to bring it back to life. In May 2014, it introduced an option to "ask" your friends about their relationship status, or other details like Hometown or School. Show me a single person who actually did this, and I'll show you a person with one less Facebook friend.

In November 2015, Facebook US introduced tools which would make a social media break-up less painful. If you break up (and change your relationship status), the site now allows you to "take a break" from an ex-partner, untag them from pictures, and generally stop them haunting your page without unfriending or blocking them. 

The move is a sensible one, especially as Facebook has come under fire for "On This Day", another feature which throws up old pictures and posts and has been depressing users the world over with pictures of their now-dead relatives or relics of past relationships. In the press release for the new relationship tools, the company says:

“This work is part of our ongoing effort to develop resources for people who may be going through difficult moments in their lives. We hope these tools will help people end relationships on Facebook with greater ease, comfort and sense of control.”

Never, ever getting back together 

Somehow, I don't think any of this will convince users to once again share the minutiae of our dating lives on social media. You could argue that my generation's rejection of relationship statuses is to do with a fear of commitment - after all, none of us have pensions or can afford houses. Research has shown that social media interaction, like a shared relationship status or photos taken together, are an indicator of "greater relationship commitment". Perhaps twenty-somethings just aren't keen to stamp Facebook-endorsed "commitment" all over their dating lives.

But it could also be that we're moving away from relationship statuses because we've realised there's a type of online sharing that can be damaging in its honesty. It's increasingly clear that even bloggers and Instagrammers who post online constantly keep their personal lives locked carefully away from their smoothie and interior decor feeds, sometimes to the detriment of their alleged "authenticity". 

We want social media to be privy to our highs, not our lows. Research has also suggested that while relationship statuses indicate commitment, they were reflective of this commitment, not participating in it. While asking someone to be your boyfriend and girlfriend is an action that actually changes the fabric of a relationship, going Facebook official isn't - unless you're a 13-year-old who still thinks this is a good way to ask. 

As such, relationship statuses are a communication of status, not a creation of one. They were never meant as a milestone for the couples themselves: they're to satisfy the sort of people who bark "BUT IS SHE ACTUALLY YOUR GIRLFRIEND?" at you, in the pub, while she's two feet away. Maybe we've just decided that our online presence should benefit us, not those who want a two-click rundown of our personal lives. 

And since you ask, I've been in a Facebook-only civil partnership with a university friend for four years now. It isn't complicated at all. 

Barbara Speed is a technology and digital culture writer at the New Statesman and a staff writer at CityMetric.