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	<title>Junior Science Reporter &#187; light</title>
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	<description>Science news for children aged 7-11</description>
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		<title>Measure the speed of light</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=454</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=454#comments</comments>
		<pubDate>Fri, 20 Feb 2015 08:39:22 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[video]]></category>
		<category><![CDATA[antinode]]></category>
		<category><![CDATA[chocolate]]></category>
		<category><![CDATA[frequency]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[microwave]]></category>
		<category><![CDATA[node]]></category>
		<category><![CDATA[physical processes]]></category>
		<category><![CDATA[speed]]></category>
		<category><![CDATA[wavelength]]></category>
		<category><![CDATA[waves]]></category>

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		<title>The Sun: Five years in three minutes</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=439</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=439#comments</comments>
		<pubDate>Fri, 13 Feb 2015 22:26:43 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[video]]></category>
		<category><![CDATA[gas]]></category>
		<category><![CDATA[helium]]></category>
		<category><![CDATA[hydrogen]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[NASA]]></category>
		<category><![CDATA[physical]]></category>
		<category><![CDATA[physical processes]]></category>
		<category><![CDATA[space]]></category>
		<category><![CDATA[sun]]></category>
		<category><![CDATA[time-lapse]]></category>

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		<description><![CDATA[This amazing video of the sun from NASA&#8217;s Solar Dynamics Observatory (SDO) shows five years of sun time in three minutes. The SDO scientists took a picture of the sun once every eight hours between June 2010 and 11 February 2015 and combined them to make the video. The different colours represent different wavelengths (types) of light). In some parts of the video the colours are blended and in some parts they are alone. Did you know the sun spins? I didn&#8217;t. It&#8217;s a ball of immensely hot hydrogen and helium gas (those are types of air) and different parts spin at different rates. The middle of the sun is about 15 million degrees Celsius. That&#8217;s another way of saying very very very very hot. Fortunately it is about 150 million kilometres away from the Earth, so we don&#8217;t get burnt up. Even so, ultraviolet rays (invisible but powerful light) from the sun can give you sunburn.]]></description>
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		<title>How to make something invisible</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=409</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=409#comments</comments>
		<pubDate>Tue, 10 Feb 2015 12:07:43 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[video]]></category>
		<category><![CDATA[glycerol]]></category>
		<category><![CDATA[invisible]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[physical]]></category>
		<category><![CDATA[physical processes]]></category>
		<category><![CDATA[pyrex]]></category>

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		<title>Sea slug: plant or animal?</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=350</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=350#comments</comments>
		<pubDate>Wed, 04 Feb 2015 17:41:36 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[Living things]]></category>
		<category><![CDATA[Living things and their habitats]]></category>
		<category><![CDATA[cells]]></category>
		<category><![CDATA[chloroplasts]]></category>
		<category><![CDATA[genes]]></category>
		<category><![CDATA[green]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[news]]></category>
		<category><![CDATA[photosynthesize]]></category>
		<category><![CDATA[sea slug]]></category>
		<category><![CDATA[spectrum]]></category>

		<guid isPermaLink="false">http://www.juniorsciencereporter.org.uk/?p=350</guid>
		<description><![CDATA[Researchers have discovered that the sea slug Elysia chlorotica uses genes from algae to gather energy from sunlight. Genes are instructions for how to build and maintain a body.  The sea slugs have &#8216;stolen&#8217; instructions for how to look after molecules called chloroplasts, which absorb energy from sunlight. The chloroplasts give the sea slugs additional energy to live and grow, so they have some energy even when they don&#8217;t eat. It also gives them a bright green colour.  (Sunlight is made up of all the colours of the rainbow; the chloroplasts look green because that&#8217;s the only colour they don&#8217;t absorb.) The researchers want to study the slugs some more to find out how the chloroplasts keep working for as long as up to nine months, which is longer than they work for in the algae.]]></description>
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		<title>Nappies and microscopes?</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=316</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=316#comments</comments>
		<pubDate>Wed, 28 Jan 2015 11:00:31 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[Materials and their properties]]></category>
		<category><![CDATA[Properties and changes of materials]]></category>
		<category><![CDATA[diapers]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[materials]]></category>
		<category><![CDATA[nappies]]></category>
		<category><![CDATA[news]]></category>

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		<description><![CDATA[Scientists have worked out a way to take better pictures of tiny parts of our bodies called cells, using disposable nappies. Professor Boyden and his colleagues found that with a special preparation based on the chemical in nappies that absorbs lots of liquid, they could make brain cells taken from rats swell to four and a half times their usual size. Our bodies are built from lots of different cells, in the same way models can be built from LEGO blocks. Usually, scientists use microscopes to see more details of tiny things. Microscopes make what you are looking at much much bigger, so you can look at an ant, for example, through a microscope and see lots of things you would otherwise miss. The trouble is that if you want to look at something really really small, like a cell taken from a dead rat&#8217;s brain, you need a much more powerful &#8211; and expensive &#8211; microscope. &#8216;We decided to try something different, and physically magnify the cells themselves,&#8217; said Edward Boyden, associate professor at the Massachusetts Institute of Technology, in the USA. That helped the researchers to use ordinary microscopes to see more detail, such as the structures that [...]]]></description>
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		<title>Morning Glory</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=194</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=194#comments</comments>
		<pubDate>Wed, 07 Jan 2015 12:54:26 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[Materials and their properties]]></category>
		<category><![CDATA[Properties and changes of materials]]></category>
		<category><![CDATA[Rocks]]></category>
		<category><![CDATA[colours]]></category>
		<category><![CDATA[geothermal]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[materials]]></category>
		<category><![CDATA[news]]></category>
		<category><![CDATA[rocks]]></category>
		<category><![CDATA[springs]]></category>

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		<description><![CDATA[Researchers at Montana State University (USA) and Brandenburg University of Applied Sciences (Germany) have come up with an explanation for the beautiful colours of hot springs in Yellowstone National Park in the USA. They created a simple way to calculate the colours that can even visually recreate how the pools appeared years ago, before tourists began to drop coins into the pools while making wishes. (The metals in the coins affect the appearance.) &#8220;What we were able to show is that you really don&#8217;t have to get terribly complex &#8211; you can explain some very beautiful things with relatively simple models,&#8221; said Joseph Shaw, a professor at Montana State University and one of the researchers. The team calculated how each pool absorbs, scatters and reflects the light, taking the microbes (tiny organisms made up of just single cells) in the pools and the weather conditions into account. Shaw said that the researchers might collaborate with biologists in the future, as the colours may provide a way to monitor the pool microbes.]]></description>
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		<title>Sunspots</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=207</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=207#comments</comments>
		<pubDate>Mon, 22 Dec 2014 10:23:04 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[Earth and space]]></category>
		<category><![CDATA[Light]]></category>
		<category><![CDATA[Physical processes]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[news]]></category>
		<category><![CDATA[sun]]></category>

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		<description><![CDATA[Bursts of magnetic activity on the sun make sunspots, which can be seen with special equipment.]]></description>
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		<title>Towards an invisibility cloak</title>
		<link>http://www.juniorsciencereporter.org.uk/?p=100</link>
		<comments>http://www.juniorsciencereporter.org.uk/?p=100#comments</comments>
		<pubDate>Wed, 19 Nov 2014 17:12:15 +0000</pubDate>
		<dc:creator><![CDATA[Joanna Carpenter]]></dc:creator>
				<category><![CDATA[Light]]></category>
		<category><![CDATA[cloak]]></category>
		<category><![CDATA[hide]]></category>
		<category><![CDATA[invisibility]]></category>
		<category><![CDATA[lens]]></category>
		<category><![CDATA[light]]></category>
		<category><![CDATA[news]]></category>

		<guid isPermaLink="false">http://www.juniorsciencereporter.org.uk/?p=100</guid>
		<description><![CDATA[Harry Potter&#8217;s invisibility cloak was magic, but scientists have recently developed several ways to make objects invisible. Most of those methods use expensive technology, but researchers at the University of Rochester (USA) have come up with a better way that uses only four lenses. Lenses are transparent and shaped so that they change the direction of light, which travels in a straight line.  `The basic idea is to take light and have it pass around something as if it isn&#8217;t there,&#8217; said John Howell, a professor of physics. With graduate student Joseph Choi, Professor Howell developed a combination of four standard lenses that keeps an object hidden. `Many cloaking designs work fine when you look at an object straight on, but if you move your viewpoint even a little, the object becomes visible,&#8217; he said. Their setup works so long as the viewer stands in the right place, or close by. They calculated carefully the lenses needed and the necessary distance between them. To test their device, they placed the object in front of a grid background. As they looked through the lenses and changed their viewing angle by moving from side to side, they could see just the grid [...]]]></description>
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