We've heard it a million times. If you drink eight glasses (or two to three litres) of water a day, you'll have better skin, fewer ____, healthier ____ ... People think that as long as they drink water all day they'll be much ____. But is it actually true? Of course, we all know that if you don't drink, you die. But the truth is that, apart from extreme situations, the body ____ very well to drinking either too much or too little water. It's also true that the water we need each day can be ____ in other drinks such as coffee, tea or juice, or even in food. It certainly does not have to be ____ water. So where does this ____ come from? When you look more ____ at some 'scientific' articles, you realise that they are ____ by mineral water ____. What r A appears to be scientific ____ can sometimes be ____ marketing. If you sit at home watching TV all the time the ____ of exercise could ____ your risk of heart ____. But new ____ has discovered that the type of programme you watch also makes a difference to your ____. A team at Cornell University had three groups of ____. Some watched an action film. others watched the same action film but without sound, and the third group watched a talk show. Some had healthy ____ in front of them, and others had snacks ____ in salt and sugar. The result? The volunteers watching the action film with sound ate 98% more than those watching the talk show. Even those watching the action film without sound ate 36% more! It ____ that faster programmes make you eat faster and pay less ____ to how much food you're eating. Interestingly, the ____ who had healthy snacks also ate more. So next time you watch an action film, put away the snacks! If you dropped a heavy object on your big toe, you probably wouldn't enjoy the ____. Pain is not something most of us like feeling. But the ____, not feeling any pain, is much, much worse. Steven Pete was born with a rare genetic ____ which means he cannot feel ____. When he was a boy he ____ his leg while roller skating. He only found out when somebody saw him and told him. The problem is that unless we ____ pain, we don't pay ____ to our body and what hurts us. Pain ____ us from injuring a body part even more. If it didn't hurt to walk on a broken leg or a sprained ____, we would keep using it and cause more damage. If your throat is really ____, you'll probably go to the doctor, who can treat the ____ before it becomes serious. As an adult, Steven Pete will have to have regular ____ in case he becomes dangerously ill without knowing it. So, the next time you go 'ouch', just remember how lucky you are. The scientific term is 'sphenopalatine ganglioneuralgia , but we usually just call it ____ freezes. Brain freeze is when you eat ice cream too quickly and you get a short, sharp pain in your ____. There is a rapid change of temperature at the back of your throat, close to two important ____ which feed ____ to the brain. The brain doesn't like things e to change. Brain freeze is a mechanism to prevent that from happening. The brain can't actually feel ____ despite its billions of ____. But the pain associated with brain freeze is sensed by ____ where the two arteries meet. Analysing brain freeze may seem like silly science to some, but it can help ____ understand other types of ____. And the ____ for brain freeze? Provided you don't eat your ice cream quickly, you'll be fine. You can also put your ____ up to the roof of your mouth or drink something neither hot nor cold to normalise the temperature in your ____.

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