The idea of creating a physical object from a digital file is fascinating. It conjures memories of the replicators in Star Trek that can create everything from clothes to starship components to different foods. Today’s 3D printing is making impressive strides in that direction, to the great interest of many manufacturers. It is now possible to print the components for sophisticated electronic devices with fairly simple equipment, for instance – as my research team has just shown by producing what we believe to be the first 3D-printed microphone.
For thousands of years people have used cannabis for recreational, ritualistic and medicinal purposes. In the modern era, the latter property excites a lot of people, and there is no shortage of wild claims about the supposed medical benefits of the plant. Of all the claims, perhaps the most bold is the assertion that cannabis can cure cancer.
For every person in the world who receives a cornea transplant, there are 69 others who still need one. That leaves about 12.5m people with limited sight because there aren’t enough eye donors. But what if we could grow new corneas in the lab?
Breakfast, we are told, is the most important meal of the day. Over the last 50 years, we have been bombarded with messages extolling the health benefits of processed cereals and porridge oats. We are told breakfast helps us reduce weight by speeding up our metabolism – this helps us avoid hunger pangs and overeating later in the day.
There’s no two-ways about it, the Universe is an extremely big place! And thanks to the limitations placed upon us by Special Relativity, traveling to even the closest star systems could take millennia. As we addressed in a previous article, the estimated travel time to the nearest star system (Alpha Centauri) could take anywhere from 19,000 to 81,000 years using conventional methods.
Regular walking produces many health benefits, including reducing our risk of heart disease, type 2 diabetes and depression. Best of all, it’s free, we can do it anywhere and, for most of us, it’s relatively easy to fit into our daily routines. We often hear 10,000 as the golden number of steps to strive for in a day. But do we really need to take 10,000 steps a day?
Do you prefer to rise early with the lark or stay up late with the owl? Your preference turns out to be partly decided by your genes. Our genetic study of nearly 700,000 people has revealed new insights about the genetics of chronotype – our preference to rise early or sleep late – and how it influences our mental and physical health.
Rapid urban population growth is driving many cities around the world to reduce their carbon footprints. In Canada, two major policy agendas are designed to achieve this: boosting urban density and promoting low-carbon transportation such as electric vehicles (EVs).
Whether waiting for a bus, playing outside or walking the dog – during the colder winter season, everyone is looking for ways to stay warm. Luckily, the process your body uses to break down foods serves as an internal heater.
Almost half of all Canadians regularly take at least one nutritional supplement such as vitamins, minerals, fiber supplements, antacids and fish oils. Many of these individuals are healthy and hoping to improve general well-being or prevent chronic disease.
There is a growing global trend to consider pets as part of the family. In fact, millions of people around the world love their pets, enjoying their companionship, going for walks, playing and even talking to them. And there is evidence suggesting that attachment to pets is good for human health and even helps build community.
The periodic table stares down from the walls of just about every chemistry lab. The credit for its creation generally goes to Dimitri Mendeleev, a Russian chemist who in 1869 wrote out the known elements (of which there were 63 at the time) on cards and then arranged them in columns and rows according to their chemical and physical properties. To celebrate the 150th anniversary of this pivotal moment in science, the UN has proclaimed 2019 to be the International year of the Periodic Table.
Unlike the effervescent bubbles that stream to the top of champagne flutes on New Year’s Eve, what I call brain bubbles are far from celebratory. These bubbles are metaphorical rather than physical, and they distort the stream of reality processed by our brains. Like a real estate bubble that reflects an inflated perception of home values, a brain bubble twists your perception of the world around you. And when either of these bubbles bursts, the results can be devastating.
Whether you’re a morning person or love burning the midnight oil, we’re all controlled by so-called “body clocks.” These body clocks (which regulate your circadian rhythms) are inside almost every cell in the body and control when we feel awake and tired during a 24-hour period. But as it turns out, our latest study found that our body clocks have a much bigger impact on us than we previously realized. In fact, our body clocks actually effect how well a person performs on both mental and physical tasks.
A little over half (approximately 3,660) of all currently used languages in the world are either threatened, dying or are as good as dead. This is the conclusion of a new report done by linguists from several universities.
New NASA research confirms that Saturn is losing its iconic rings at the maximum rate estimated from Voyager 1 & 2 observations made decades ago. The rings are being pulled into Saturn by gravity as a dusty rain of ice particles under the influence of Saturn’s magnetic field.
When school begins later, teens get more snooze time—and grades and attendance improve, a new study shows. ‘The time at which teens generally fall asleep is biologically determined—but the time at which they wake up is socially determined,’
Recently analyzed data from NASA’s Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer (OSIRIS-REx) mission has revealed water locked inside the clays that make up its scientific target, the asteroid Bennu.
It’s embarrassing, but astrophysicists are the first to admit it. Our best theoretical model can only explain 5% of the universe. The remaining 95% is famously made up almost entirely of invisible, unknown material dubbed dark energy and dark matter. So even though there are a billion trillion stars in the observable universe, they are actually extremely rare.
Low energy efficiency is already a major problem for petrol and diesel vehicles. Typically, only 20% of the overall well-to-wheel energy is actually used to power these vehicles. The other 80% is lost through oil extraction, refinement, transport, evaporation, and engine heat. This low energy efficiency is the primary reason why fossil fuel vehicles are emissions-intensive, and relatively expensive to run.
'Oumuamua, meaning scout or messenger in Hawaiian, is the name given to the first detected interstellar object to visit our Solar System. On discovery last year, 'Oumuamua was classified as a comet, but this was later withdrawn when no evidence for cometary activity was detected.
In the past thirty years, the number of planets discovered beyond our Solar System has grown exponentially. Unfortunately, due to the limitations of our technology, the vast majority of these exoplanets have been discovered by indirect means, often by detecting the transits of planets in front of their stars (the Transit Method) or by the gravitational influence they exert on their star (the Radial Velocity Method)
Why is my awareness here, while yours is over there? Why is the universe split in two for each of us, into a subject and an infinity of objects? How is each of us our own center of experience, receiving information about the rest of the world out there? Why are some things conscious and others apparently not? Is a rat conscious? A gnat? A bacterium?
Imagine trying to map out your home town using only information you could gather from your window. Even with a pair of binoculars you’d find it a difficult task. Mapping out our own galaxy, the Milky Way, is a similarly daunting mission. Unlike other galaxies that we can view from a distance, we sit inside the Milky Way – around 26,000 light years from its center. This means that when we try to look at the opposite side of the galaxy, much of our view is blocked by the stars and dust in between.
The human desire to create ever bigger and more impressive structures is insatiable. The pyramids of Ancient Egypt, the Great Wall of China and the Burj Khalifa in Dubai – now the tallest edifice in the world at over 828 metres (2,722 ft) – are a consequence of pushing engineering to its limits. But huge buildings aren’t just monuments to human ambition: they might also hold the key to humanity’s progress in the space-faring age.