Author: The Conversation

Electric planes might seem futuristic, but they aren’t that far off, at least for short hops. Two-seater Velis Electros are already quietly buzzing around Europe, electric sea planes are being tested in British Columbia, and larger planes are coming. Air Canada announced on Sept. 15, 2022, that it would buy 30 electric-hybrid regional aircraft from Sweden’s Heart Aerospace, which expects to have its 30-seat plane in service by 2028. Analysts at the U.S. National Renewable Energy Lab note that the first hybrid electric 50- to 70-seat commuter plane could be ready not long after that. In the 2030s, they say, electric aviation could really take off. That matters for…

We all know the routine by heart: “Please ensure your seats are in the upright position, tray tables stowed, window shades are up, laptops are stored in the overhead bins and electronic devices are set to flight mode”. Now, the first four are reasonable, right? Window shades need to be up so we can see if there’s an emergency, such as fire. Tray tables need to be stowed and seats upright so we can get out of the row quickly. Laptops can become projectiles in an emergency, as the seat back pockets are not strong enough to contain them. And…

Commercial aviation has become a cornerstone of our economy and society. It allows us to rapidly transport goods and people across the globe, facilitates over a third of all global trade by value, and supports 87.7 million jobs worldwide. However, the 80-tonne flying machines we see hurtling through our skies at near supersonic speeds also carry some serious environmental baggage. My team’s recent review paper highlights some promising solutions the aviation industry could put in place now to reduce the harm flying does to our planet. Simply changing the routes we fly could hold the key to drastic reductions in climate impact. Modern aeroplanes burn kerosene…

Stem cells are the starting point for all other cells in our bodies. The first such cells to be found were blood stem cells – as the name suggests, they give rise to different types of blood cells. But there’s much we don’t know about how these cells develop in the first place. In a study published today in Cell Reports, we have shown how a lab simulation of an embryo’s beating heart and circulation lead to the development of human blood stem cell precursors. The tiny device mimics embryonic blood flow, allowing us to directly observe human embryonic blood formation under the…

The English Premier League (EPL) celebrates its 30th season this year, and much has changed since the league’s inception in 1992. For many long-time fans, the period may well be defined by the influx of money into the sport, with player wages ballooning, transfer records toppling, and broadcasting deals reaching into the billions of pounds. Some of this wealth has been used to impose major technological enhancements on the league, including the video assistant referee (VAR), goalline technology, and vanishing spray applied to the playing surface by the referee to indicate where set plays should be taken from. Meanwhile, increasingly advanced player tracking systems have given commentators and pundits access to team performance…

Sometimes it seems like passwords have been with us forever, and yet every year we’re reminded how we still don’t use them properly! The annual publication of the “worst passwords” list shows we haven’t become much more password savvy over the decade. And while several replacements for the humble password have been proposed, none have come close to the ease of using the traditional method. But this changes today with the introduction of Passkeys – an update in Apple’s latest iOS 16 operating system. Passkeys could be the long-awaited solution to password malpractice, and the near-constant problem of compromised credentials. What’s wrong with passwords?…

In many busy households around the world, it’s not uncommon for children to shout out directives to Apple’s Siri or Amazon’s Alexa. They may make a game out of asking the voice-activated personal assistant (VAPA) what time it is, or requesting a popular song. While this may seem like a mundane part of domestic life, there is much more going on. The VAPAs are continuously listening, recording and processing acoustic happenings in a process that has been dubbed “eavesmining,” a portmanteau of eavesdropping and datamining. This raises significant concerns pertaining to issues of privacy and surveillance, as well as discrimination, as the…

Say you are looking for a new job. You head to LinkedIn to spruce up your profile and look around your social network. But who should you reach out to for an introduction to a potential new employer? A new study of more than 20 million people, published in Science, shows that your close friends (on LinkedIn) are not your best bet: instead you should look to acquaintances you don’t know well enough to share a personal connection with. The strength of weak ties In 1973, the American sociologist Mark Granovetter coined the phrase “the strength of weak ties” in the context of social…

In simple terms, digital money can be defined as a form of currency that uses computer networks to make payments. Breathless media coverage of the future potential of cryptocurrencies such as Bitcoin has made digital money a hot topic. One of the main differences between digital money and physical currency, such as cash, is that digital money lacks any identifying features that make it unique. If you take a glance at any bank notes you might have sitting in your wallet or purse, you will quickly notice that each note has a serial number — a unique string of letters and…

More than half of the thousands of satellites in orbit are now defunct, and this accumulation of floating space debris has been described as a “fatal problem” for current and future space missions and human space travel. An estimated 130 million objects smaller than 1cm and 34,000 larger than 10cm are travelling in orbit at speeds of thousands of kilometres per hour, according to the European Space Agency (ESA). A report presented at this year’s European conference on space debris suggests the amount of space junk could increase fifty-fold by 2100. While many fragments of space junk are small, they travel so…