5 TOP FACTS GIANT STRUCTURES

1 The original megastructure, the Great Wall stretches an incredible 8,851km (5,500 miles), making it easily the longest man-made structure on Earth. Great Wall of China

2 The 2km dam spanning the Yangtze submerged 13 existing cities, 140 towns and over 1,300 villages, requiring the relocation of 1.5 million people. Three Gorges Dam

3 This retired garbage dump covering 12 square kilometres (4.6 square miles) of New York’s Staten Island was once piled higher than the nearby Statue of Liberty. Fresh Kills Landﬁ ll

4 Built largely by hand over 2,000 years ago, these terraced rice paddies cover 10,360 square kilometres of steep mountainside in the Philippines. Banaue Rice Terraces

5 This colossal open-pit mine located in Eastern Siberia, Russia is 525 metres (1,722 feet) deep and 1.25km wide. In the Sixties it produced two tons of diamonds per year.Mirny Diamond Mine

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HOW CAN WE MOTIVATE OURSELVES MORE EFFECTIVELY THROUGH REINFORCEMENT?

•We'd all like to be more effective in reaching our goals, and according to behaviorists, the way to improve our effectiveness is by rewarding ourselves for the little steps that take us closer and closer to those desirable outcomes. •First, find something you really like to do or something you'd like to have that can, realistically, serve as a reward. •Then, take the goal that you are hoping to achieve that, realistically, you could achieve but just haven't succeeded at yet. •Next, work backward from that goal to your present state. •Arrange to give yourself those desired rewards as you inch closer from where you are now to the desired end point. •As you start to make progress, only give yourself a reward when you've moved forward from where you are now. •For example, if you'd like to cut back on your television watching and instead read more often, reward yourself by allowing yourself to watch television only when you've read for 20 minu...

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Inside an MRI scanner

When doctors need the highest quality images possible they turn to MRI scanners, but how do they work? MRI scan ,MRI test, MRI use in medical field, constitutent of MRI machine. Doctors often plan treatments based on imaging. X-rays, ultrasound and CT scans provide useful pictures, but when the highest quality images are needed, they turn to MRI scanners. While CT scanners use x-rays and therefore expose the patient to radiation, magnetic resonance imaging (MRI) uses powerful magnets and is virtually risk free. MRI scans are obtained for many medical conditions, although since they are expensive and complicated to interpret, they certainly aren’t as easy as taking a chest x-ray. Examples for which they are used include planning surgery for rectal cancers, assessing bones for infection (osteomyelitis), looking at the bile ducts in detail for trapped gallstones, assessing ligamental damage in the knee joints and assessing the spinal cord for infections, tumours or...

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