The fall brings the total value of all Bitcoin in existence to below $87bn.

Hackers have deleted more than 6,500 sites being held on a popular Dark Web server.

The photo-sharing service say it will warn those using popularity-boosting services before taking action.

Deaf gamers have urged developers to patch the magic dragon and add subtitles to the Spyro games.

The US firm says it will take home rentals in Israeli settlements on occupied land off its website.

Contact lens retailer says more than 16,000 customers' were at risk of data theft.

Matthew Hanley, 23, and Connor Allsopp, 21, accessed customers' information during the cyber attack.

The contact lens was designed to help people with diabetes monitor their glucose levels

Curbing excessive gadget use among children is hard, say parents asked for survey.

How British veterans are using their military skills to retrain as IT security experts.

Thomas Bromley failed to renew the patent on his digital clock, and missed out on a fortune.

Which? says suppliers would have to triple their installation rate to reach the 2020 deadline.

For the first time in 24 years, Sony won't be at the huge gaming convention in 2019.

Tens of thousands of pilots trained in a tiny, mechanical flight simulator which has been restored.

The Fusion bot shares and teaches skills by transferring body motions from one person to another.

Actor Elijah Wood voices a main character in the first video game made by Aardman Animations.

Trains that emit pure water could be in the UK by the "early 2020s", according to the government.

Mitsubishi has developed a new indoor lighting system that mimics blue skies, sunrises and sunsets.

Staff at Dalby Forest in the North York Moors wondered why an electric barrier was playing up.

Margaret Wilson, 95, says she will hold true to an oath she swore at Bletchley Park in World War Two.

From fake shops to copycat products, firms around the world are losing billions to copyright theft.

Sophie Roberts is a software developer at the tech giant who came out at work in October.

Netflix is the leader in online video. Will Disney's plans check its growth?

Is much-heralded nuclear fusion finally ready to fulfil its promise of abundant energy for all?

Scientists hope artificial intelligence will gives us more insights into bee health and behaviour.

Microplastics have swamped our ecosystem. Can tech help prevent them entering our water systems?

As more of half of us live in cities, scientists are looking at new ways of harnessing urban energy.

Good computer security means working around one big security flaw - us.

Nothing to be Written is a VR experience about field postcards sent home by soldiers during WW1.

Using artificial intelligence to spot future fashion trends could also help reduce clothing waste.

The DelFly is a flying robot inspired by how insects achieve flight.

BBC Click’s Lara Lewington looks at some of the best technology news stories of the week.

Some imams in Kurdistan have officially banned a hugely popular video game – but others are hitting back.

BBC Click’s Nick Kwek looks at some of the best technology news stories of the week.

Security experts have found serious security flaws in MiSafes watches for children.

Superfast 5G mobile promises lots of benefits, but will it be worth the money?

Artificial intelligence creates a computer generated video which manipulates the newsreader’s mouth.

Why face-mapping technology designed to improve TV dubbing is raising fears about fake news.