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Think about the last time you used cash. How much did you spend? What did you buy, and from whom? Was it a one-time thing, or was it something you [...]

What is it? A public, permanent, append-only distributed ledger What's that? A mathematical structure for storing data in a way that is nearly impossible to take. It can be used [...]

Last June Facebook unveiled a 'global digital currency' called Libra. The idea triggered a backlash and Libra may never launch, at least not in the way it was originally envisioned. [...]

By making the basic building blocks of batteries out of ink, Harvard materials scientist Jennifer Lewis is laying the groundwork for lithium-ion batteries and other high-performing electronics that can be […]

The whole point of using a blockchain is to let people-in particular, people who don't trust one another--share valuable data in a secure, tamperproof way. That's because block-chains store data [...]

Launched: 2009 Market value: $163 billion The strengths: The original crypto-currency, Bitcoin is the largest and most popular blockchain network-and the most battle-tested against attackers. The downside: Growing demand has [...]

How much power should the U.S. government have to compel technology companies to help it access their users' encrypted information? Last year's dramatic showdown between the FBI and Apple came [...]

BREAKTHROUGH Computer scientists are perfecting a cryptographic tool for proving something without revealing the information underlying the proof. WHY IT MATTERS If you need to disclose personal information to get [...]

The Bitcoin phenomenon isn't about a bunch of people who all believe the cryptocurrency is a good investment. That's part of it. But for many, the belief in Bitcoin's power [...]

For a refugee in a new country, identity, at least in the official sense, can be among the hardest things to recover. And without an official ID it is nearly [...]

* The rash of headline-grabbing cyberattacks on major companies over the past few years has made one thing abundantly clear: it's not enough to rely only on traditional security tools. [...]

The inventor of a new kind of 3D printer says his research group will build a massive machine capable of mass-producing competitively priced plastic parts within two years. Making plastic [...]

BRINGING SCIENTIFIC RIGOR TO THE STUDY OF INTERNET CENSORSHIP. [ILLUSTRATION OMITTED] Five years ago, when Phillipa Gill began a research fellowship at the University of Toronto's Citizen Lab, she was [...]

TRYING TO MAKE SURE THAT Al BENEFITS HUMANITY. [ILLUSTRATION OMITTED] Human-like artificial intelligence is still a long way off, but Greg Brockman believes the time to start thinking about its [...]

Could a neck-worn device protect the brains of athletes and soldiers against traumatic injury? That's the promise of technology that researchers are beginning to test in humans. The idea behind [...]

Air conditioning accounts for almost 15 percent of all energy use by buildings in the United States. One way to cut that proportion is to send heat to outer space, [...]

Silicon probably won't be replaced as the dominant solar material anytime soon, but it might not be too long before it gets a partner from a promising class of materials […]

Bacterial infection is a fairly common and potentially dangerous complication of wound healing, but a new 'intelligent' dressing that turns green to signal the onset of an infection could serve […]

Harry Atwater thinks his lab can make an affordable device that produces more than twice the solar power generated by today's panels. The feat is possible, says the Caltech professor [...]

The cost of sequencing human genomes is plunging--in the most advanced genomics centers, it's falling five times faster than the cost of computing. Increasingly, people are getting their DNA sequenced [...]

The use of wind and solar power ballooned almost ninefold from 2000 to 2009, the most recent year for Which the International Energy Agency has made data available. But that [...]

On the night last spring when Osama bin Laden was killed, the chief of staff to a former U.S. secretary of defense broke the news to the world--more than an [...]

The retirement of the space shuttles marks the end of NASA's human spaceflight program, at least for now. But human missions funded by the U.S. government have represented only a [...]

Wind turbines, electric vehicles, light-emitting diodes, flat-screen displays, and solar panels all rely on elements that are mined and refined in just a few countries and traded in small quantities. [...]

In the United States, energy production will account for almost 90 percent of the projected increase in consumption of freshwater between 2005 and 2030, according to Argonne National Laboratory. Power [...]

Researchers at the University of California, Berkeley, say that by combining nanoscale materials with bacteria, they have opened the door to a new way of efficiently turning carbon dioxide, water, […]

Sales of electric vehicles in China, the world's largest auto market, have been minuscule despite government incentives meant to put five million of the cars on the nation's roads by […]

Using tiny biodegradable particles to disrupt the body's immune response after a heart attack could help save patients from tissue damage and certain long-term health problems that often follow. Researchers […]

One of the most important innovations in Apple's latest iPads lies behind the screen. In some of the tablets, the pixels in the display are controlled by transistors made of […]

A new way of growing graphene could make it feasible for the remarkable material to become the basis of electronic devices that greatly outperform today's computers. Graphene, a single-atom-thick carbon […]

Today's 3-D printers can generally make things out of only one type of material--usually a plastic or, in certain expensive machines, a metal. They can't build electronics, optical devices, or [...]

Canada is about to make the world's biggest bet on carbon capture and storage (CCS), a technology that is unproven at the scale needed to significantly decrease greenhouse gas emissions. [...]

Researchers have reduced blood alcohol levels in intoxicated mice by injecting them with nanocapsules containing enzymes that are instrumental in alcohol metabolism. The treatment demonstrates a novel drug delivery technology [...]

For the past five years, the Global Innovation Index has ranked countries' ability to stimulate invention. Published by the French business school INSEAD and the World Intellectual Property Organization, it [...]

Many things will have to happen if we are to lower greenhouse-gas emissions enough by 2050 to avoid catastrophic climate change. One of those things, according to a number of [...]

When Facebook went public in May, the company was valued at $104 billion, an astonishing figure for an Internet company. Was the figure preposterously high? That depends on how you [...]

The article reports that the cost of sequencing human genomes in the most advanced genomics centers were plunging, and falling five times quicker than computing cost, where people gets their deoxyribonucleic acid (DNA) sequenced by research labs in a search for clues on genetic variation.

Diagrams and figures are presented on global electricity demand and the share of electricity produced from various sources including coal, nuclear power, and solar energy.

The article discusses the process through which a "tweet" or a post on the social networking site Twitter goes viral. Gilad Lotan, head of research and development for startup company SocialFlow, used his firm's access to a real-time stream of every tweet to visualize the responses to a post made by former U.S. government official Keith Urbahn on the death of Osama bin Laden in spring 2011. Knowing when, how and what to tweet about in order to best disseminate a message widely is also cited.

Several charts are presented on space flights for military, commercial, and government purposes which have been sent by various countries till July 2011 which include the U.S., Russia, and China.

The article depicts the availability of a handful of critical elements such as, germanium, selenium, cobalt, etc., in North and South America.

Several charts related to water including its use for various sources of fuel and electricity, consumption and scarcity in the U.S. are presented.