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To continue reading this article, please exit incognito mode or log in. Visitors are allowed 3 free articles per month without a subscription , and private browsing prevents us from counting how many stories you've read. We hope you understand, and consider subscribing for unlimited online access. Even if interest in Bitcoin fades, it could still have a lasting legacy as an inspiration to better-designed forms of digital money. In recent weeks, the digital currency Bitcoin has soared and then dipped in value, along the way attracting more public attention than ever before and speculation as to whether it could become an established and widely accepted way to pay for goods and services.
Several others are also surging in popularity and value, and they claim to offer technical improvements that make them better suited to mainstream use.
Some of these competing currencies already represent significant stores of value. The Bitcoin alternatives are inspired by that design, which is published openly, and try to offer improvements. Bitcoin transactions are verified by the work of software run by other people using the currency, a process that takes on average 10 minutes and can be much longer, an hour in the case of many exchange sites.
Lee says that hinders operators of online stores from using the currency. New bitcoins are created through a process known as mining, in which people run software that competes to solve a computational puzzle. Each time a puzzle is cracked, new coins are awarded and a new challenge is set.
In a neat twist, the process of solving a puzzle also confirms the validity of recent transactions made with bitcoins. However, because more powerful computers are more likely to solve these puzzles, an arms race between bitcoin miners has resulted. Lee says that will make Litecoin less dependent on the activity of a small number of dedicated miners with expensive equipment, allowing a larger pool of miners to compete.
That has the effect of decoupling mining and the confirmation of transactions from the cost of electricity and computer power, which King says would be a problem for Bitcoin if it were to become very widely used. Some Bitcoin devotees worry that alternative currencies could hinder efforts to make the leading cryptocurrency mainstream, but Selgin says that competition could simply increase the odds that any one cryptocurrency succeeds.
Catch up with our coverage of the event. Content creation is hugely expensive for video-game makers. A way to automate some of the process would be hugely valuable, and this could be it.
Experts suggest that having AI systems try to outwit one another could help a person judge their intentions. To make AI programs smarter, researchers are creating virtual worlds for them to explore.
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Addressing Bias in AI AI generates new Doom levels for humans to play. How can we be sure AI will behave? Perhaps by watching it argue with itself. Facebook helped create an AI scavenger hunt that could lead to the first useful home robots.
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