The food we eat is the greatest cause of death and illness worldwide. The main culprits - salt, sugar and fat - are now so embedded in our diet, in the form of processed foods, that most of us consume far too much.Yet Professor Graham MacGregor doesn't believe it's up to us to reverse this situation. It's up to the food industry, he says, who manufacture the processed foods, to take the 'rubbish' out. Now Professor of Cardiovascular Medicine at the Wolfson Institute of Preventative Medicine, Graham MacGregor has spent much of his career campaigning tirelessly to persuade the food industry to do just that - to reduce these demons in our diet - firstly salt, and now sugar.And he's had remarkable success. As a nation we now eat thirty thousand tonnes less salt each year than we did fifteen years ago, saving the NHS a staggering �1.5 billion per year.Blood pressure lies at the heart of this huge saving and, as Graham explains to Jim al-Khalili, blood pressure is not a natural consequence of ageing. High blood pressure is simply a consequence of too much salt. Producer: Beth Eastwood.
Wissenschaft & Technik
The Life Scientific Folgen
Professor Jim Al-Khalili talks to leading scientists about their life and work, finding out what inspires and motivates them and asking what their discoveries might do for us in the future
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348 Folgen
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Folge vom 25.04.2017Graham MacGregor on tackling the demons in our diet
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Folge vom 18.04.2017Liz Sockett on friendly killer bacteriaProfessor Liz Sockett studies an extraordinary group of predatory bacteria. Bdellovibrio may be small but they kill other bacteria with ingenious and ruthless efficiency. Liz has devoted the last fifteen years of her career as a microbiologist to work out how this microscopic killer invades and consumes its victims - victims which include a host of disease-causing bacteria which have also acquired resistance to antibiotics which once killed them.As well as studying the numerous tricks and weapons which Bdellovibrio have evolved to despatch and feed on other bugs, Prof Sockett's lab at the University of Nottingham is also testing the bacteria's potential as a new kind of treatment in the era of antibiotic resistance. Deadly infections may not be able to outwit this bacterial top predator in the way they have with ever increasing numbers of antibiotic drugs.Liz talks to Jim Al-Khalili about how a BBC TV children's show first introduced her to the superfast killer bacteria, how Roman villas led her towards a life of discovery, and how her lab in Nottingham might be compared to the kitchen of a restaurant and her team to a brigade of chefs.Producer: Andrew Luck-Baker.
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Folge vom 11.04.2017Nick Fraser on Triassic reptilesNick Fraser regularly travels back in time (at least in his mind) to the Triassic, a crazily inventive period in our evolutionary history that started 250 million years ago. Wherever there are ancient Triassic creatures buried underground, Nick is never far behind; and his 'fossil first' approach to life has been richly rewarded. In 2002, he unearthed a new species of gliding reptile in Virginia, USA. Last year in southern China, he identified the remains of a creature so utterly odd that the paleontologists who studied this species before him had got it all wrong. And earlier this year he was part of a tiny but hugely exciting discovery much closer to home, hidden in the Scottish borders in rocks that are over 350 million years old: an ancient amphibian, imaginatively named Tiny, that is the earliest known example of an animal with a backbone to live on land. It may even have had five fingers. Producer: Anna Buckley.
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Folge vom 04.04.2017Daniel Dennett on the evolution of the human brainDaniel Dennett has never been one to swallow accepted wisdom undigested. As a student he happily sought to undermine the work of his supervisor, Willard Quine. Only one of the most respected figures in 20th century philosophy, a thinker eminent enough to appear on US postage stamps. Later in Oxford, he became frustrated by his fellow philosophers' utter lack of interest in how our brains worked and was delighted when a medical friend introduced him to neurons. And so began an intellectual quest to understand the human mind that spans five decades. He has always believed that our minds are machines. And anyone who disagrees lacks imagination, he says. Reading The Selfish Gene by Richard Dawkins introduced him to the power of Darwin's theory of evolution. And he has, perhaps, taken Darwinism further than anyone, seeking to explain how we evolved from uncomprehending bacteria to highly intelligent human beings. We know humans and chimpanzees evolved from a common ancestor. And that we share 99 % of our DNA with our closest animal relatives. So why would poetry, ethics, science and literature be somehow cut-off or insulated from our underlying biology? "You've given this much ground. Think about giving a little bit more". Producer: Anna Buckley.