1 . One overlooked benefit of lab-grown food is that it may help the UK deal with the crisis in housing affordability. As farming is replaced by precision fermentation (发酵) , the significant amount of land currently used for livestock farming(including parts of the green belt) will be freed up for development in places that people actually want to live.

However, we’d take a different lesson from the promise of lab-grown meat. Free-market environmentalism and harnessing the power of innovative technologies — supported by market-based measures like a border-adjusted carbon tax — can successfully tackle the problem of man-made climate change without fundamentally uprooting the way we run society. Saving the planet doesn’t have to cost us the earth.

It is important to acknowledge that certain types of livestock farming may have issues with sustainability and climate change. But it is not true of all farming systems; and the issues that do exist are being dealt with using the latest research into genetics and biotechnology-for example, recent research has shown that certain types of seaweed can reduce methane emissions from cattle to close to zero.

Farmer data also shows that increased sales of milks have not seen a corresponding reduction in dairy sales.

The global food system, consumer choices and climate change are incredibly complex issues, and anyone who proposes simple solutions is almost certainly not in possession of all the relevant facts and data. Livestock are an important part of humanity’s future food needs.

2 . In July 1915, severely tortured by his poor health, James Murray, one of the early editors of the Oxford English Dictionary (OED), defined one final word. After his 36 years’ dedication to the dictionary, his hard labour had taken a toll, knowing he would not see the project complete.

The poetic quality of Murray’s final days is one of the many memorable tales in The Dictionary People. Beginning in 1857, the OED was a huge crowdsourcing project - “the Wikipedia of the 19th century” - comprising 3, 000 people. The idea was to create a “descriptive” dictionary that tracked words’ use and meaning over time, unlike its “prescriptive”18th-century predecessor by Samuel Johnson, which told readers how to say and use words. Volunteers read widely, mailing in examples of how “rare, old-fashioned, new, strange” words were used. What is surprising about this fairly random method is that it worked.

The origin story of Sarah Ogilvie’s book is almost as improbable as that of the dictionary itself. Ms Ogilvie, a former scholar who served as an editor for the OED, went into the documents of Oxford University Press and came across an old notebook. It had belonged to Murray and contained the names and details of the dictionary volunteers, most of whom had previously been unknown. The Dictionary People is her work of detective scholarship, bringing the lives behind the names to readers.

Ms Ogilvie’s book is full of intriguing stories. The presentation of the book is unconventional, too, taking its structure from the work it describes. There are 26 alphabetical chapters, each celebrating a group of contributors ( memorably, “K” is for “kleptomaniac” people who desire to steal). This is a clever arrangement, though it sometimes means that broader issues emerge only in pieces.

Essentially, this is a story about ordinary people. It is concrete proof of those who, to cite dictionary-helper George Eliot, “lived faithfully a hidden life, and rest in unvisited tombs”.

4 . We may weep for the dodo, but could and should we bring this lovely bird back from the dead? De-extinction is the science of restoring lost species and it has been in the news for decades.

The story in modern times began in 1990 when Michael Crichton published his science fiction novel Jurassic Park, in which he imagined a world where scientists were able to bring dinosaurs back to life. Crichton imagined that polymerase chain reaction (PCR) technology could be a way to amplify (放大) tiny quantities of dinosaur DNA and thus build a living embryo.

Sadly, biologists soon realized that DNA in fact breaks down super-fast; even after 100 years, DNA from museum skins of dodos was decayed (腐烂) beyond repair. They could be sequenced (测定序列) using massive computational power, but then only with considerable uncertainty. And even if you capture a DNA sequence, there’s still the problem of how you get living cells to read that sequence and express proteins that make the dinosaur or the dodo.

But why would anyone want to see mammoths, or something like them, roaming (漫游) present-day Siberia? Well, they were undoubtedly amazing beasts. As well as hunting them, our distant ancestors painted their likenesses in caves across Europe. Fascinating as they may be, there's some ecological justification for the project too.

It was this diversity of land surface, broken up by heavy limbs and randomly fertilised by faeces (排泄物), that supported so much flora (植物群). Without the mammoths, that diversity disappeared. Return them and landscapes would once again be with a variety of species, including flowers and bushes.

True, it’s not de-extinction in the sense of bringing a long-dead species back to life. Instead it’s more like making a “dodo” by engineering a modern pigeon, its closest relative, to become huge and flightless. The result would be a big, fatty pigeon that, whether it looked like a dodo or not, would probably fulfil some of its ecological roles.

As a palaeontologist, I would of course love to see living dinosaurs, mammoths and dodos. In some ways, though, I am relieved that the optimistic claims for cloning and genetic technologies have not been borne out. The slowdown gives us time to consider the outcomes—and hopefully avoid some of Michael Crichton’s more fevered imaginings.

5 . When it came to imaging the future, Arthur C. Clarke stubbornly refused to take credit for any predictions. The Internet, 3-D printers, email: he may have described them all long before they existed. As a science fiction writer, he came up with the idea of a “personal transceiver” that is small enough to be carried about, able to contact with anyone in the world and perform global positioning, making getting lost a thing of the past. Elsewhere, he predicted everything from online banking to reusable spacecraft. His best remembered fictional work of all is 2001: A Space Odyssey. It also happened to forecast the iPad, computer software that is able to read lips, and space stations.

Interestingly, his vision of the future has barely aged. For example, life in Sri Lanka inspired his 1979 novel, featuring a “space elevator”, a planet-to-space transportation system that would do away with the need for rocket travel. Those human settlements on Mars or Venus are decidedly behind schedule(we humans were expected to have set foot on both by 1980), and we’re still looking for the key that should have fully unlocked the languages of whales and dolphins by 1970.

It’s a way of thinking that was likely fuelled by his inability to be anything other than utterly absorbed in all that interested him. At the very start of his career, he shared a flat on London’s Gray’s Inn Road with fellow science fiction writers who nicknamed him “Ego” because of his talent for turning out (关掉) distraction. Once he’d become a big enough name to be interviewed, he’d send journalists home loaded with research papers.

He once said, “Trying to predict the future is a discouraging and risky occupation.” If a prediction sounds at all reasonable, technological progress is sure to leave it seeming “ridiculously conservative”. But if, by a miracle, a person were to be able to describe the future exactly as it will unfold, “His predictions will sound so absurd and far-fetched that everybody would laugh him to scorn (轻蔑).”

6 . The days that make us happy make us wise.

--- John Masefield

When I first read this line by England's Poet Laureate, it _____________   me.   What   did Masefield mean? Without thinking about it much, I had always assumed that the _______ was true. But his serious assurance was ________. I was deeply attracted by it.

Slowly, I seemed to ________ his meaning and realized the wisdom that happiness makes possible lies in clear perception(洞察力), not _______ by anxiety nor dimmed by despair and boredom, and without the blind _______ caused by fear.

Active happiness---not mere satisfaction or _______---often comes suddenly, like an April shower or the unfolding of a bud. Then you discover what kind of wisdom has ____________ it. Amazingly, in your eyes, the grass is greener; bird songs are sweeter; the _________   of your friends are more understandable, and more forgivable. Happiness is like a pair of eyeglasses correcting your ________ vision.

Nor are the __________ of happiness limited to what is near around you. Unhappy, with your thoughts focused on your emotional woes (痛苦) , your vision is cut short as though blocked by a wall. Happy, the wall _________.

Consequently, the long vision is there for the seeing. The ground at your feet, the world about you---people, thoughts, emotions, pressures---are now ____________ a larger scene. Everything covers a fairer _________. Everything around you, whether it is encouraging or frustrating, no longer seems such a big deal. And here is the beginning of _________.

7 . A gene variant (变体) that causes the “alcohol flush (脸红)” reaction increases the risk of heart disease by causing inflammation of blood vessels (脉管), especially in drinkers. Around 8 percent of the world’s populations has a gene variant called ALDH2*2 that impairs the body’s ability to break down alcohol and causes unpleasant symptoms such as flushing soon after people drink. Now, researchers have shown why this change also raises the risk of heart disease.

“We are trying to understand why ALDH2*2 is associated with a higher risk of coronary arte (冠状动脉) disease at a cellular (细胞的) level,” says Hongchao Guo at Stanford University in California.

The ALDH2*2 gene encodes one version of the enzyme (酵素) alcohol dehydrogenase (脱氢酶), which breaks down the toxic acetaldehydes (乙醛) produced when alcohol is metabolized (代谢), and also mops up other harmful substances known as free radicals.

The gene variant also impairs the growth of new blood vessels. “That means that when there is a heart attack, when there is a need of blood vessel growth, carriers have less ability to generate new blood vessels,” says Guo.

The team found that an existing diabetes (糖尿病) drug called empagliflozin may reduce these harmful effects in people with ALDH2*2 who drink a lot of alcohol. But for Wu, the take-home message is clear. “If you’re missing this enzyme, try not to drink,” he says. “If you drink consistently, you are at much higher risk of heart disease, hypertension, diabetes and cancer.”

Given its many negative consequences, there has been debate about why this change spread and became common, today being found in more than a third of people of cast Asian origin.

“My only explanation is that if you are missing this enzyme, you tend to drink less and there’s therefore less chance of you becoming alcoholic,” says Wu.