Waiting for the end of the world

Supervolcanoes, ash clouds, supernovas, asteroids, climate chaos - take your pick.

So, we’re finally there: December 2012, the month the world ends. Assuming the Mayan prophecies are right, it seems awfully late in the day for the University of Cambridge to open its Project for Existential Risk.

Martin Rees, a former president of the Royal Society and noted doom-monger, is leading the way. He has long been convinced that human activity is capable of wiping us all out. We should worry less about the effect of pesticides in our food, he says, and more about the possibility of a bioengineering lab unwittingly releasing a new plague into the world. Or someone pressing the nuclear bomb button. Or robots rising up to make us their slaves. Or computers becoming sentient and shutting down the systems on which we depend.

These are the “low-probability, high-impact” events that could do us in and we’re not paying them enough attention. “These issues require a great deal more scientific investigation than they currently receive,” says the project’s philosopher, Huw Price.

We could be accused of an overinflated self-importance here. The greater part of humanity has always survived a virus pandemic, for instance, so there is no reason to think that any human-engineered virus will bring about an extinction event. Yes, the computers and robots could become self-aware in theory but that’s something we’ve been actively trying to engineer for decades – without success. And they might not want to destroy us even if they do become sentient. At least, not until they get to know us.

Much more scary is what natural catastrophes – whether on earth or beyond it – could do to us. We can reasonably expect a catastrophic supervolcano eruption in the next 100,000 years, for instance. The ash cloud from such an event would do more than keep aircraft grounded: it would envelop the earth in near-darkness for years, bringing global food production to a halt. Billions would die.

A supernova explosion or gamma-ray burst that fires its radiation towards earth would destroy the ozone layer, creating an ultraviolet ray burden that would give most of us fatal cancers. Such events happen at random every few hundred million years and there is no defence.

We might be able to deflect an incoming asteroid but species-destroying asteroids are not too frequent. Experts reckon that an impact with global significance happens maybe twice in a million years. For now, the skies are clear.

It’s worth noting that scientific projects such as the one starting out in Cambridge talk about existential risks to humanity but tend to focus on events that would primarily affect developed western societies. You are much more likely to suffer a nuclear strike, say, if you live in a highly developed part of the world, especially one of its capital cities.

Similarly, an event that destroys electricity supply infrastructure – whether it results from terrorist action or a solar flare – poses a much greater existential risk for those living in areas where heating or air conditioning is essential to survival. Again, these tend to be more developed, technologically reliant societies.

In many ways, it’s the inverse of the climate change threat. Rising sea levels and crop failures may change the economics of the western world but they are not an existential threat here. Less developed areas of the world, however, face total wipeout. These areas are powerless to protect themselves, largely because they are not the source of the problem. It would be interesting to set up a Tuvalu Project for Existential Risk. The islanders might well conclude that their most pressing problem would be solved by a small nuclear war among the earth’s major civilisations.

Michael Brooks’s “The Secret Anarchy of Science” is published by Profile Books (£8.99)

Fragments of a star: an image of a Cas A supernova. Photograph: Getty Images

Michael Brooks holds a PhD in quantum physics. He writes a weekly science column for the New Statesman, and his most recent book is At the Edge of Uncertainty: 11 Discoveries Taking Science by Surprise.

This article first appeared in the 10 December 2012 issue of the New Statesman, Greece: a warning for Britain?

A second referendum? Photo: Getty
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Will there be a second EU referendum? Petition passes 1.75 million signatures

Updated: An official petition for a second EU referendum has passed 1.75m signatures - but does it have any chance of happening?

A petition calling for another EU referendum has passed 1.75 million signatures

"We the undersigned call upon HM Government to implement a rule that if the remain or leave vote is less than 60% based a turnout less than 75% there should be another referendum," the petition reads. Overall, the turnout in the EU referendum on 23 June was 73 per cent, and 51.8 per cent of voters went for Leave.

The petition has been so popular it briefly crashed the government website, and is now the biggest petition in the site's history.

After 10,000 signatures, the government has to respond to an official petition. After 100,000 signatures, it must be considered for a debate in parliament. 

Nigel Farage has previously said he would have asked for a second referendum based on a 52-48 result in favour of Remain.

However, what the petition is asking for would be, in effect, for Britain to stay as a member of the EU. Turnout of 75 per cent is far higher than recent general elections, and a margin of victory of 20 points is also ambitious. In the 2014 independence referendum in Scotland, the split was 55-45 in favour of remaining in the union. 

Unfortunately for those dismayed by the referendum result, even if the petition is debated in parliament, there will be no vote and it will have no legal weight. 

Another petition has been set up for London to declare independence, which has attracted 130,000 signatures.