Hannah Fry takes a spectacular look at the science of size by imagining a parallel world in which everything is made bigger or smaller.

Is your smart phone making you stupid? Can you make yourself cleverer? The Great British Intelligence Test measures the brainpower of the nation in one of the largest intelligence experiments of its kind. Devised with leading scientists at Imperial College, London, over 250,000 people around the nation have taken part so far - revealing important new science about the nation’s changing intelligence. In this Horizon special, Dr Hannah Fry and Michael Mosley put the public to the test, pitting young and old, males and females and tech lovers and readers against each other in a battle of wits. The audience can also play along online at The results reveal new science about how our intelligence changes through our life. Which mental abilities peak in our 80s? And when can adults be outsmarted by ten-year-olds? It explores how our gender can affect our intelligence and uncovers groundbreaking new science on how our lifestyle and love of technology is changing our brain. Which of our digital habits are improving our mental abilities and which are harming us? With the very latest science, this film reveals the best ways to boost your brainpower.

Artificial Intelligence is starting to transform healthcare beyond recognition. The vision for tech companies is to get AI computers to diagnose diseases as well as a human doctor, which could ultimately result in accessible, more affordable, better healthcare for almost everyone. In a world with a chronic shortage of doctors, but where even the very poor own mobile phones, it could be truly revolutionary. And in Britain, advances in AI are already radically changing how some of us see our GPs. Dr. Hannah Fry uncovers the controversial inside story of this revolution in healthcare, with privileged behind-the-scenes access to tech companies leading the way in healthcare innovation. Ambitious British tech start-up Babylon Health launched its ‘GP at Hand’ app in London in late 2017 and has already persuaded 30,000 Londoners to quit their old GPs to register instead for this NHS ‘digital first’ service, where patients discuss symptoms with an AI chatbot and see a doctor in minutes 24/7 via their phone. Babylon’s CEO Dr. Ali Parsa talks passionately about how he hopes “to do with healthcare what Google did with information”. Kheiron Medical have also opened their doors, with their Clinical Director Dr. Hugh Harvey explaining how Kheiron’s technology is already outperforming human radiologists at spotting signs of cancer in mammograms. But this sector is new and challenging and GP at Hand’s arrival has proved controversial – with many GPs worried about the disruptive consequences for both patients and themselves. We hear from medical professionals such as Professor Helen Stokes-Lampard, Chair at the Royal College of GPs, who expresses caution about the hype around AI, voicing concerns about to what extent apps like ‘GP at Hand’ have been rigorously tested. Big questions are also raised about AI in healthcare: if it can be trusted, how it should be regulated - and what it means for all of us.

赞德冯托勒金博士是个正在寻找真爱的单身汉。数学家汉纳佛莱博士想以他为实验对象，测试交友网站用来替人们配对的算法是否真的有效。在她架设交友网站期间，赞德与研究在线约会网站的科学家们见面，学习该在他的个人档案使用哪种大头贴和自我介绍。他试用了一个能自动运作配对应用程序的机器人，并做了核磁共振检查他的脑部是否具备爱的条件。一共有五十名一般人士在约会之夜参与了小型实验，而赞德则会赴各种不同的约，测试算法是否比他自己随机挑选对象还管用。

英国人每年在食品杂货上的消费达1900亿英镑，生产商和超市当然不会放过如此大的商机，有时采用的促销手段并不光彩。数学家Hannah Fry和餐饮专家Priya Tew引导消费者判断超市食品的品质优劣

你知道過去 100 年，讓最多人致死的災難是什麼嗎？ 是碳排放？海嘯？世界大戰？ 還是…… 1918 年爆發的西班牙流感，曾經造成全世界約五億人感染，死亡人數上看一億人，比一戰和二戰死亡人數的加總還多。這場橫掃世界的瘟疫，距今不過一百年，流感帶來的致命威脅也從未遠離。英國公共電視 BBC 與科學家合作，製作了本集節目，以大規模的社會實驗，模擬致命流感爆發的情形。 流行病學的數學模式專家指出，英國目前的流行病計畫憑藉的是樣本僅有數百或數千人的有限資料集，這表示流行病學家必須努力揣測人的行為，要是揣測錯誤，結果也就可能錯誤。僅管現代的人已經有許多可被追蹤的數位資訊，然而，以疾病傳遞方式為主軸的資料集卻還不足，因為這樣的資料集需要串連兩方面的數據：移動的動態，以及接觸人群的情況。 於是，收集數據的任務，被交到 BBC 流行病團隊手上，數學模式專家開出的理想資料庫人數是一萬人，不過，在數位時代，BBC 流行病資料庫的規模順利成長為兩萬八千多人的巨型資料庫。利用手機應用程式，讓大家自願「感染」虛擬流感病毒，藉以取得移動位置的數據，請參與者提供年齡、性別，並配合記錄下 24 小時內接觸的對象。 BBC 的另一場流行病實驗，由漢娜．弗萊博士扮演「零號病患」，在黑索米爾小鎮閒晃，觀察病毒人傳人的途徑，以掌握疫病爆發時該如何防堵。黑索米爾有五百名志願者參與這個實驗，然而，僅是一天時間，該小鎮的參與者已經有 77 人受到感染，三天之後，疫情更是一發不可收拾，高達 86% 的參與者都被傳染了。透過這個實驗，指認出哪些人可能成為「社會超級散播者」，並利用程式模擬為這 10% 的超級傳播者接種疫苗，就讓感染人數下降 40%。 為何區區流感竟有這麼大的殺傷力？在擁有抗生素與疫苗的現代醫療體系下，我們還需要擔心流感的爆發嗎？ 答案竟是肯定的。根據 BBC 流行病應用程式推算出來的結果，一旦爆發大規模流行病，在疫苗供應前，英國的感染人數推估將達到四千三百萬，可能會有八十萬人死亡。 在人、物與資本都快速流動的全球化時代，防疫體系似乎也變得越來越脆弱。歷史殷鑑不遠，大規模流感必然會發生，只是遲早的問題。所幸，藉由數學模擬與電腦程式等現代科技，能幫助我們預作準備，面對生死攸關的重大決策。

At the heart of the climate change debate is a paradox - we've never had more information about our changing climate, yet surveys show that the public are, if anything, getting less sure they understand what's going on. This programme aims to remedy that, with a new perspective on the whole subject. Presented by three mathematicians - Dr Hannah Fry, Prof Norman Fenton and Prof David Spiegelhalter - it hones in on just three key numbers that clarify all the important questions around climate change. The stories behind these numbers involve an extraordinary cast of characters, almost all of whom had nothing to do with climate change, but whose work is critical to our understanding of the climate. The three numbers are: 0.85 degrees (the amount of warming the planet has undergone since 1880) 95 per cent (the degree of certainty climate scientists have that at least half the recent warming is man-made) 1 trillion tonnes (the total amount of carbon we can afford to burn - ever - in order to stay below 'dangerous levels' of climate change) Understanding how scientists came up with these three numbers gives a unique perspective on what we know about the past, present and future of our changing climate.

A witty, exhilarating and mind-expanding exploration of the word of our times - data - with mathematician Dr Hannah Fry. Following in the footsteps of BBC Four's previous gleefully nerdy, award-winning maths films The Joy of Stats, Tails you Win - The Science of Chance and The Joy of Logic, this new high-tech romp reveals exactly what data is and how it is captured, stored, shared and made sense of. Fry also tells the story of the engineers of the data age, people most of us have never heard of despite the fact they brought about a technological and philosophical revolution. For Hannah Fry, the joy of data is all about spotting patterns. She's Lecturer in the Mathematics of Cities at UCL as well as being the presenter of the BBC series Trainspotting Live and City in the Sky, and she sees data as the essential bridge between two universes - the tangible, noisy, messy world that we see and experience, and the clean, ordered, elegant world of maths, where everything can be captured beautifully with equations. Along the way the film reveals the connection between Scrabble scores and online movie streaming, explains why a herd of Wiltshire dairy cows are wearing pedometers, and uncovers the remarkable network map of Wikipedia. What's the mystery link between 'marmalade' and 'One Direction'? The Joy of Data also hails the giant contribution of Claude Shannon, the American mathematician and electrical engineer who, in an attempt to solve the problem of noisy telephone lines, devised a way to digitise all information. It was Shannon, father of the 'bit', who singlehandedly launched the 'information age'. Meanwhile, the green lawns of Britain's National Physical Laboratory host a race between its young apprentices in order to demonstrate how and why data moves quickly and successfully around modern data networks. It's all thanks to the brilliant technique first invented there in the 1960s by Welshman Donald Davies - packet switching - without which there would be no internet as we know it. But what of the future, big data and artificial intelligence? Should we be worried by the pace of change, and what our own data could and should be used for? Ultimately, Fry concludes, data has empowered all of us. We must have machines at our side if we're to find patterns in the modern-day data deluge. But, Fry believes, regardless of AI and machine learning, it will always take us to find the meaning in them.