Why Do We Have To Sleep? • 2015 It's Okay To Be Smart

Category: Health
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Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place.

It's Okay To Be Smart • 0 • 6 episodes •

How Many Heartbeats Do We Get?

Ever wonder how the heart symbol came to stand for the actual heart? And why do we speak of the heart as the seat of love, when love really happens in our brains? Is it true that animals only get a billion heartbeats? This week, we give you enough cool cardiac science to make your heart skip a beat.

Science

Climate Science: What You Need To Know

Learn the basic science of climate change in 24 easy steps.

Environment

There's No Such Thing As Cold

You've felt cold before. Sometimes it's cold outside. But what if I told you that "cold" isn't real? There's no substance or quantity called "cold" in science. We can't measure the amount of "cold" in something. Instead it's about what's NOT there.

Physics

Why Do We Have To Sleep?

Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place.

2015 • Health

100,000,000 Years From Now

100,000,000 years from now, a team of alien geologists arrive at a mysterious blue-green planet, and decide to investigate. Here's what they'll find…

2016 • Science

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Professor Green: Is It Time to Legalise Weed?

As his name suggests, rapper and documentary maker Professor Green has a past relationship with cannabis. Before finding success as a musician he sold weed, and between the ages of 16 and 24 he smoked cannabis every day - but things have changed since then. With those days behind him, Professor Green, aka Stephen Manderson, embarks on a uniquely personal film to take an in-depth look at our relationship with Britain’s most popular illegal drug and explores the arguments for and against legalisation. Stephen explores today’s booming UK cannabis industry, from the realities of life as a dealer, grower and even weed robber, to the consumers with ever-increasing options about how and what they buy. With cannabis laws around the world now changing – as US States like California fully legalise the drug – Stephen meets those hoping to make their future millions out of legalisation here in the UK. As he comes to reflect on his background and wrestle with his own past, Stephen explores addiction and the links between cannabis use and mental health.

2017 • Health

Heart vs Mind: What Makes Us Human?

The heart is the most symbolic organ of the human body. Throughout history it has been seen as the site of our emotions, the very centre of our being. But modern medicine has come to see the heart as just a pump; a brilliant pump, but nothing more. And we see ourselves as ruled by our heads and not our hearts. In this documentary, filmmaker David Malone asks whether we are right to take this view. He explores the heart's conflicting histories as an emotional symbol and a physical organ, and investigates what the latest science is learning about its structures, its capacities and its role. In the age-old battle of hearts and minds, will these new discoveries alter the balance and allow the heart to reclaim something of its traditional place at the centre of our humanity?

Health

Viruses: Destruction and Creation

What is a virus? How does it affect humans and how does it spread? Doctors, virologists and scientists examine the spread of the Zika virus, what effect this growing epidemic may have on large populations, and possible next steps to stop the illness.

2016 • Health

Can't Cook or Won't Cook?

One in five families eat convenience foods at least three times a week and a government survey showed only one in six mothers cook from scratch every day. In the first of four food programmes over the next fortnight, the Tonight programme investigates why some of us can’t cook or won’t cook and what can be done to get Britain back in the kitchen. The UK has the largest consumption of ready meals in Europe. It’s no surprise; they are cheap, convenient and easy. A few minutes in a microwave and dinner is served. But for some families the ready meal isn’t always the first choice, it’s sometimes the only choice.

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The Enemy Within

One in three of us will develop cancer and many will die from it.

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The Ultimate Machine

This time, we meet a girl with two hearts, a man who can sing two notes at once, a woman who can bend in amazing ways, a girl who is allergic to everything and a man who can run 350 miles without stopping. These remarkable cases reveal the secret inner workings of our bodies - the ultimate piece of natural engineering.

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