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From gravity lamps to data journalism, SciDev.Net brings you the articles that had most visitors in 2013. Which SciDev.Net articles do you find the most useful?

Which SciDev.Net articles do you find the most useful? Let us know by commenting below or tweeting us @scidevnet using #bestof2013

Gravity-powered lamp to enter field tests
A battery-free lamp powered by gravity will be put through its paces in rural Africa and Asia.

Desert bacteria could help boost crop yields
Scientists in the Middle East have identified soil microbes that could help make desert agriculture more resistant to salinity and drought.

The pros and cons of social media in global health
Social media can aid global health, but they also present many risks, according to a World Health Summit session.

Adapting to the realities of getting science into policy
Messages about the workings of policymaking should be easier to come by, and can inform how scientific evidence is presented.

Trials needed to test camel-urine cancer drug claims
Saudi researchers say they have discovered a cancer-curing compound in camel urine, but further trials are needed to test the claims.

Cheap 'nano-tablet' purifies water for up to six months
US researchers have launched a small ceramic disc containing nanoparticles that can purify water in poor communities.

Coastal cities to pay high price for climate change
The cost of coastal flood damage — US$1 trillion a year — will hit cities in developing countries hardest.

Rifts emerge in scientists’ views on safety of GMOs
A group of 93 scientists say that claims that GM foods are safe for humans ‘have no scientific basis’.

Data journalism: how to find stories in numbers
Sandra Crucianelli offers tricks and tools for finding, interpreting and presenting stories from data.

Rice gene digs deep to triple yields in drought
Researchers have bred a rice plant that withstands drought by doubling the depth of its roots.

What were your favourite stories this year?