The trend started as a form of empowerment, a way for people to feel sexy and good in their bodies. But because everything is terrible, some people have found a way to turn a feel-good trend into depraved gratification.

There are now many videos on YouTube instructing people how to use editing software or apps to change the contrast and color in a way that reduces the silhouette effect. Because participants are just a silhouette in the challenge, many are wearing less clothing, or lingerie, or nothing at all. The goal of the editing is to reveal their bodies.

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Can you find the fake online?
Select an age-appropriate quiz to play as a family (parents versus children) to learn and test your knowledge on what fake news, disinformation and misinformation is and how to stop it from spreading.

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The insidious problem of online violence against women journalists is increasingly spilling offline with potentially deadly consequences, a new global survey suggests.

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Report Harmful Content is provided by UK Safer Internet Centre and operated by SWGfL.

UK Safer Internet Centre is a partnership of three leading organisations with one mission - to promote the safe and responsible use of technology for young people. The partnership was appointed by the European Commission as the Safer Internet Centre for the UK in January 2011 and is one of 31 Safer Internet Centres in the Insafe network.

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BBC Reality Check team has looked into some of the most widely shared false claims: about alleged plots to put microchips into people, the supposed re-engineering of our genetic code, and about safety.

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Children searching for content relating to depression and self-harm can be exposed to more of it by the recommendation engines built in to social networks.

Sophie Parkinson was just 13 when she took her own life. She had depression and suicidal thoughts.

Her mother, Ruth Moss, believes Sophie eventually took her own life because of the videos she had watched online.

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