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 • 2015 - 2016 • 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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In the US, 80% of girls have been on a diet by the time they're 10 years old. In this honest, raw talk, neuroscientist Sandra Aamodt uses her personal story to frame an important lesson about how our brains manage our bodies, as she explores the science behind why dieting not only doesn't work, but is likely to do more harm than good. She suggests ideas for how to live a less diet-obsessed life, intuitively.

TED • 2013 • Health

Human Experimentation: The Good, The Bad, & The Ugly

In the early days of the space race, agency researchers in Russia and at NASA really weren't sure all what would happen to an astronaut in space. They didn't know if a human mind could handle actually seeing Earth or what would happen to the human body when exposed to long periods of weightlessness. Would their blood forget which way to pump? Would their eyeballs shift or their inner ears wig out? They sent up mice and monkeys and dogs, to see what happened, and in 1961, the Russians strapped a man to a rocket headed for orbit. Yuri Gagarin was the first person in space. The ultimate human guinea pig, he survived, becoming an international hero.

SciShow • 2014 • Health

Vaccines - Calling the Shots

Diseases that were largely eradicated in the United States a generation ago—whooping cough, measles, mumps—are returning, in part because nervous parents are skipping their children’s shots. NOVA's "Vaccines—Calling the Shots" takes viewers around the world to track epidemics, explore the science behind vaccinations, hear from parents wrestling with vaccine-related questions, and shed light on the risks of opting out.

Health

How to Use Drugs

We’re still only at the dawn of learning how to use drugs properly – knowing what drugs we need and when we should take them. We look forward to a brighter future for drug use.

The School of Life • 2016 • Health

Tricks of the Junk Food Business

Do you know when an advert is really an advert? Can you be sure that the game you're playing isn't trying to make you buy something? When it comes to protecting our children from sugary food, the world of online advertising is the new frontier. Harry Wallop investigates and finds big name brands marketing fattening food in the games children play. Dispatches goes undercover in the ad world, creating a high-sugar drink to see who's willing to promote it to young children, and revealing the tricks of the trade.

2014 • Health

The Honest Supermarket: What's Really in Our Food

For every pound we spend on food shopping, 77p goes to the supermarkets, giving them a huge influence over what we eat. But can we trust the supermarkets to tell us the truth about what we are buying and how it was produced? Or do their profits come first? In an experiment to discover the hidden truths about our everyday foods, Horizon has built the first ever truly 'honest supermarket'. Drawing on the latest scientific research and leading experts from across the UK, the team have built a supermarket where the products are labelled with the real story of how they are produced and their effect on us and the environment. We invite the British public to come in and discover the truth about their favourite foods. And in our on-site lab, new scientific discoveries reveal the food facts the supermarkets aren't telling you. Presented by Dr Hannah Fry and dietician Priya Tew, The Honest Supermarket takes a cold hard look at what's really going on with the food we eat. From new research that reveals you're likely to be ingesting plastic particles along with your bottled water to the lab tests that uncover the disturbing truth about just how old your 'fresh' supermarket fish really is… You'll never look at the food on your supermarket shelves in the same way again.

Horizon • 2019 • Health