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1 Girl could give birth to sibling
http://news.bbc.co.uk/2/hi/health/6264082.stm
Should the girl opt to use the eggs and gain regulatory approval, she would effectively have a baby that was her half-brother or sister. Critics said the work, presented at a fertility conference in Lyon, was deeply concerning.
2 Sodium: Getting rid of dirt - and murder victims
http://www.bbc.com/news/magazine-27257822
Be warned, this article contains material some readers may find distressing. That's because it's about sodium - and the story of one of Italy's most notorious serial killers illustrates elegantly some of this element's unique properties.
3 Calcium, building block for the world
http://www.bbc.com/news/magazine-26416749
It's the fifth most abundant element on earth - and the world's building block. Do we fully appreciate the value of calcium? Most of us are familiar with the idea that our bodies need calcium. I remember being told to drink up my milk because the calcium in it would make my bones strong.
4 Continue reading the main story
http://www.bbc.com/news/magazine-25977432
In Elementary Business, BBC World Service's Business Daily goes back to basics and examines key chemical elements - and asks what they mean for businesses and the global economy.
5 Chlorine: From toxic chemical to household cleaner
http://www.bbc.com/news/magazine-27057547
Few chemicals are as familiar as table salt. The white crystals are the most common food seasoning in the world and an essential part of the human diet. Sodium chloride is chemically very stable - but split it into its constituent elements and you release the chemical equivalent of demons.
6 Lithium: A metal that floats on oil and powers our phones
http://www.bbc.com/news/magazine-26993915
Lithium, a key ingredient in lightweight batteries, is already powering the modern world, and could be key to getting the world to reduce its reliance on fossil fuels. Look at a satellite image of South America. Halfway down on the left-hand-side is a distinctive white splodge.
7 Why do we value gold?
http://www.bbc.com/news/magazine-25255957
Mankind's attitude to gold is bizarre. Chemically, it is uninteresting - it barely reacts with any other element. Yet, of all the 118 elements in the periodic table, gold is the one we humans have always tended to choose to use as currency. Why?
8 Mercury: A beautiful but poisonous metal
http://www.bbc.co.uk/news/magazine-25130770
Mercury is the quixotic bad boy of the periodic table - exquisitely beautiful, but deadly. The ancients believed it was the "first matter" from which all other metals were formed. Yet it is now in such disfavour that an international treaty exists to curb its use.
9 Tungsten: The perfect metal for bullets and missiles
http://www.bbc.com/news/magazine-28263683
Imagine a lump of iron the size of a tennis ball. Weigh it in your hand. Now let it drop on to your foot. How does that feel? Now imagine an identical object three times as dense. How would that feel if you dropped it? Would you ever walk again? That metal is tungsten.
10 Flexible nano-pixel screen patented
http://www.bbc.com/news/science-environment-28231084
Scientists have patented a new way to make ultra high-res displays that can bend and are thousandths of a mm thick. They used a miniscule layer of a phase-change material, that flips between two chemical states when hit with current.
11 #BBCtrending: Venezuela's airport 'breathing' tax
http://www.bbc.com/news/blogs-trending-28227198
The biggest international airport in Venezuela is charging a fee for the right to inhale clean air - and social media users are not happy. We're used to a seemingly endless range of taxes and surcharges when we fly - passenger taxes, departure taxes, fuel levies.
12 Europe Isis: Seeking missing sons in Syria
http://www.bbc.com/news/world-middle-east-28267921
The BBC's Duncan Crawford on the border of Turkey and Syria has met a Belgian father who made a dangerous three-day journey to northern Syria in a bid to persuade his son to leave the ranks of Isis militants.
13 Research Ethics
http://xkcd.com/1390/
14 Glass Half Empty
http://what-if.xkcd.com/6/
15 Vanishing Water
http://what-if.xkcd.com/103/
16 Surface Area
http://xkcd.com/1389/
17 Keyboard Power
http://what-if.xkcd.com/102/
18 People are Stupid
http://xkcd.com/1386/
19 Throwing Rocks
http://xkcd.com/1385
20 Big Brother at work may be no bad thing
https://www.bbc.com/news/business-27813535
The next time you talk to someone at work who's wearing a name badge, look at it very closely - it might not actually be a badge at all, but a sensor. It might be telling your employer who you're talking to and in what sort of tone of voice, writes Lucy Kellaway.

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