"In science, you've got to go against what the elders are saying"

The string theorist Brian Greene has grown from maths prodigy to physics iconoclast. Now he hopes to

As a child, Brian Greene interpreted the story of Icarus differently to most people. "In my naivety, I thought that it was a story about a boy who was bucking authority, not doing what his father said and yet he was paying the ultimate price," he says. "As I got older and became a scientist, it seemed more off-base, because in order to have great breakthroughs in science, you've got to go against what the elders are saying."

Greene has spent his career as a physics professor doing exactly that, exploring the wild frontiers of superstring theory: an unproven, untested and possibly untestable outcrop of theoretical physics. It's an attempt to resolve a conundrum: that we have working explanations of the universe on a grand scale (Einstein's general relativity) and the subatomic scale (quantum mechanics) but no one can reconcile the two. String theory tries to provide a "theory of everything" by suggesting that all matter is, at its smallest level, made of one-dimensional, vibrating loops, whose oscillation patterns determine their mass and "flavour".

For more than a decade, this 48-year-old vegan has been its most compelling advocate. As he wrote in 1999, "String theory has the potential to show that all of the wondrous happenings in the universe -- from the frantic dance of subatomic quarks to the stately waltz of orbiting binary stars; from the primordial fireball of the big bang to the majestic swirl of heavenly galaxies -- are reflections of one, grand physical principle, one master equation."

Greene now lives in upstate New York but he was born in what was, in 1963, a rough district of Manhattan. His father, Alan, a high-school drop-out who became a professional musician and composer, spotted his son's precocious mathematical ability when he was just five and set him to work multiplying 30-digit numbers on huge sheets of construction paper. When that began to pall, he asked the young Brian to calculate the number of inches between the earth and the Andromeda galaxy. "That is a very straightforward calculation," he tells me now, sitting in the tea room of a London hotel, "because people know how far away it is in light years. Then you need to convert light years into miles, miles into feet and feet into inches."

His mother has always been less impressed by what he does. "My mom says: 'Why aren't you a doctor?' and I'm like, 'I am a doctor!' and she's all, 'No, I mean a real doctor.' She reads my books but she says they give her a headache."

His run-down school ran out of things to teach him when he was 11, so one of the staff sent him knocking on the doors of the graduate students at Columbia University, bearing a note: "Take this kid on, he's hungry to learn." Thankfully, one of them did. "For no money," he points out. "Because we didn't have any money. He just did this for the love of learning."

Time travel

It is fitting that Greene is now a professor at Columbia and co-director of its Institute for Strings, Cosmology and Astroparticle Physics. Every few years, he gives what he calls a "report from the trenches" of cutting-edge theoretical physics. In 1999, he wrote an introduction to the subject, The Elegant Universe, followed in 2004 by a book on space-time and the nature of reality. This year, it's parallel universes.

His latest book, The Hidden Reality, suggests that our universe could be one of many, "like slices of bread in a cosmic loaf" or "one expanding bubble in a grand, cosmic bubble bath". He explains the idea of a literal "fabric" of space-time by telling me that a spinning black hole exerts a drag on the space around it, "like a pebble in a vat of molasses -- as the pebble spins, the molasses spins with it". His relaxed, metaphorical prose style has got him into trouble before. One reviewer complained that he "indulge[d] in a pandering sort of lyricism", but of greater concern to Greene were those who read his clear explanations and then turned up at his graduate class expecting to understand the content. One man spent ten years in his basement trying to take his first book's ideas to the next level. "He wrote how his wife almost left him because he wouldn't come out of the basement," Greene tells me. "It was heartbreaking."

Asked to name his scientific hero, he picks Albert Einstein, along with Edward Witten, a Princeton physicist. At the start of the 20th century, Einstein overturned the principles of physics by rejecting Isaac Newton's theory of gravity because it conflicted with his discovery that nothing travels faster than the speed of light. "So many of us," Greene says, "revere [Einstein] but it needs to be said -- because I've seen it reported in an odd way -- that we don't revere Einstein like some gurus of New Age cults may be revered, or some religious leaders. We are constantly critical of everyone's contributions, even Witten's. We look at a given paper, we bang it around, knock it, try to break it."

The same goes for string theory, which could turn out to be completely wrong. "It's a highly speculative subject but I don't shrink from that," he says. "If you ask me: 'Do I believe in string theory?' The answer is: no, I don't. I don't believe anything until it is experimentally proven [and] observationally confirmed."

How would he feel if it turned out to be a blind alley? His answer is surprising. "I would be thrilled." He explains: "I don't mean that in an off-handed way. My emotional investment is in finding truth. If string theory is wrong, I'd like to have known that yesterday. But if we can show it today or tomorrow, fantastic . . . It would allow us to focus our attention on approaches that have a better chance of revealing truth."

This isn't a discipline for the faint-hearted. When Greene was studying for his PhD at Oxford in the 1980s, he was tackling one of the fundamental ideas required to make the maths of string theory work: that there are more than three spatial dimensions. "Our eyes only see the big dimensions but beyond those there are others that escape detection because they are so small," he says. "Yet the exact shape of the extra dimensions has a profound effect on things that we can see, like what the electron weighs, its mass, the strength of gravity."

When he began his doctoral research, there were five possible shapes, one of which he ruled out by mathematical analysis. "The problem was, when I turned back to the list of shapes to look at the second, the list had grown. It was 100. Then 1,000, then 10,000. Ten thousand is still potentially doable -- it would keep an army of graduate students busy for a while -- but, nowadays, it has reached ten to the power of 500, which is an unimaginably huge number; the number of the particles in the observable universe is about ten to the power of 80."

Faced with this abundance, some physicists have decided to abandon the search, while others (including Greene) are trying to find equations to narrow down the field. A third group has a more radical proposal. "Those physicists have said we should take seriously the failure to pick out one shape from the many, because maybe that's telling us there is no unique shape. Maybe the maths is telling us that there are many universes and in each universe one of those shapes is in the limelight."

Mind the gap

Physicists can be an iconoclastic bunch but is there not a danger that their conviction gives fuel to the climate sceptics and creationists who say that science is a belief system, too? "Science is a self-correcting discipline that can, in subsequent generations, show that previous ideas were not correct," Greene counters. "When it comes to climate change . . . [and] the preponderance of data is pointing in a given direction, your confidence needs to rise proportionate to that. The data is very convincing."

He also has trenchant views about religious belief. "My view is that science only has something to say about a very particular notion of God, which goes by the name of 'god of the gaps'. If science hasn't given an explanation for some phenomenon, you could step back and say, 'Oh, that's God.' Then, when science does explain that phenomenon -- as it eventually does -- God gets squeezed out. I think the appropriate response for a physicist is: 'I do not find the concept of God very interesting, because I cannot test it.'"

Before I leave, I raise the idea of the "infinite multiverse", where every possible outcome of an event spins off a different universe. Dropped your piece of toast, buttered side down? There's now a universe where the opposite happened and you didn't have to scrape the fluff off your breakfast. It's one way of dealing with the fact that although a given outcome might have 30 per cent probability, and another might have 70 per cent, nowhere in the laws of physics is there a reason why one happens and not the other.

Doesn't that render the idea of free will redundant? "Yes," he says baldly. "We do not see free will in the equations: you and I are just particles governed by particular laws. Every individual, faced with five choices, would make all five -- one per universe. And all of the choices would be as real as the others." Don't we deserve credit for picking the choice that keeps us in this universe? Greene shakes his head. "Not really, because you are following one trajectory of choices. It is not as though there was a place in the mathematics where your free will dictated that particular set of choices. You are knocked around by the laws of physics, just like all your copies in the other universes."

I look at the preppy professor sitting opposite me drinking a cup of chai and wonder if there is a Brian Greene in another universe who was turned away by every grad student he asked for help. "And joined some gang and just been a street thug?" he says, smiling. "It is possible."

Brian Greene's "The Hidden Reality" is published by Allen Lane (£25)

Helen Lewis-Hasteley is an assistant editor of the New Statesman

Helen Lewis is deputy editor of the New Statesman. She has presented BBC Radio 4’s Week in Westminster and is a regular panellist on BBC1’s Sunday Politics.

This article first appeared in the 06 June 2011 issue of the New Statesman, Are we all doomed?

HELEN SLOAN / THE FALL 3 LTD
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The Fall is back - and once again making me weary

Five more episodes to go, after which its “feminist” writer (his word, not mine), Allan Cubitt, should pull the plug on it at last. Plus: Damned.

It is with much weariness that I return to The Fall (Thursdays, 9pm), the creepy drama that still doesn’t know whether it wants to be a horror-fest or a love story. I’ve written in the past about what I regard as its basic misogyny – to sum up, it seems to me to make a fetish of the violence committed against women, a preoccupation it pathetically tries to disguise by dint of its main character being a female detective – and I don’t propose to return to that theme now. However, in its early days, it was at least moderately gripping. Now, though, it appears to be recovering from some kind of nervous breakdown. If in series two the plot was wobbling all over the place, series three has misplaced the idea of drama altogether. Nothing is happening. At all.

To recap: at the end of the last series, Paul Spector, aka the Belfast Strangler (Jamie Dornan), had been shot while in police custody, somewhat improbably by a man who blames him for the demise of his marriage (oh, that Spector were only responsible for breaking up a few relationships). On the plus side for his supposed nemesis, DSI Stella Gibson (Gillian Anderson), before he fell he led them to Rose Stagg, the ex-girlfriend he’d locked in the boot of a car some days previously, and she is going to live. On the minus side, Spector’s injuries are so bad, it’s touch and go whether he’ll survive, and so Gibson may never see him brought to justice. Of course, the word “justice” is something of a red herring here.

The real reason she wants Spector to live is more dubious. As she stared at his body in the ICU, all tubes and monitors, her expression was so obviously sexual – her mouth opened, and stayed that way, as her eyes ran over every part of his body – that I half expected her to reach out and stroke him. Just in time for this nocturnal visit, she’d slipped into another of her slinky silk blouses that look like poured cream. (Moments earlier – think Jackie Kennedy in 1963 – she’d still been covered in her love object’s blood.)

The entire episode took place at the hospital, police procedural having morphed suddenly into Bodies or Cardiac Arrest. Except, this was so much more boring and cliché-bound than those excellent series – and so badly in need of their verisimilitude. When I watch The Fall, I’m all questions. Why doesn’t Stella ever tie her hair back? And why does she always wear high heels, even when trying to apprehend criminals? For how much longer will the presumably cash-strapped Police Service of Northern Ireland allow her to live in a posh hotel? Above all, I find myself thinking: why has this series been so acclaimed? First it was nasty, and then it was only bad. Five more episodes to go, after which its “feminist” writer (his word, not mine), Allan Cubitt, should join Gibson in the ICU, where together they can ceremonially pull the plug on it at last.

Can Jo Brand do for social workers in her new comedy, Damned, what she did a few years ago for geriatric nurses in the brilliant Getting On? I expect she probably can, even though this Channel 4 series (Tuesdays, 10pm), co-written with Morwenna Banks and Will Smith, does have an awfully inky heart. Hungry children, drug-addict parents, a man who can go nowhere without his oxygen tank: all three were present and correct when Rose (Brand) went to visit a client who turned out to be a woman who, long ago, had nicked her (Rose’s) boyfriend. Ha ha? Boohoo, more like.

Damned is basically The Office with added family dysfunction. Al (Alan Davies) is a hen-pecked wimp, Nitin (Himesh Patel) is a snitch, and Nat (Isy Suttie) is the stupidest and most annoying temp in the Western world. This lot have two bosses: Martin (Kevin Eldon), a kindly widower, and Denise (Georgie Glen), the cost-cutting line manager from hell. And Rose has a plonker of an ex-husband, Lee (Nick Hancock). “I’ve been invited to the Cotswolds for the weekend,” he told her, trying to wriggle out of looking after the children. “Is that why you look like a knob?” she replied.

Jerky camerawork, naturalistic acting, a certain daring when it comes to jokes about, say, race: these things are pretty familiar by now, but I like it all the same.

Rachel Cooke trained as a reporter on The Sunday Times. She is now a writer at The Observer. In the 2006 British Press Awards, she was named Interviewer of the Year.

This article first appeared in the 29 September 2016 issue of the New Statesman, May’s new Tories