Author: The Conversation

Weather forecasting is an important science. Accurate forecasting can help to save lives and minimise property damage. It’s also crucial for agriculture, allowing farmers to track when it’s best to plant or helping them protect their crops. And it will only become more vital in the coming years. Severe weather events are becoming more frequent and more intense because of climate change and variability. I am a meteorologist with specialities in forecasting weather and climate change – who wants to improve the quality of weather products and their applications to spur socioeconomic development across Africa. Doing so matters: the World Bank has pointed out that better weather forecasts…

White holes are really just something scientists have imagined — they could exist, but we’ve never seen one, or even seen clues that one may exist. For now, they are an idea. To put it simply, you can imagine a white hole as being a black hole in reverse. So if time was running backwards, black holes would look like white holes. But time doesn’t run in reverse in our universe. To understand more, let’s start by thinking about how black holes work. What’s a black hole? When you drop a tennis ball, it falls to the ground due to what…

News emerged overnight of the potential theft of more than US$326 million (A$457.7 million) of Ethereum tokens from a blockchain bridge (which connects two blockchains so cryptocurrency can be exchanged between them). The wormhole network was exploited for 120k wETH. ETH will be added over the next hours to ensure wETH is backed 1:1. More details to come shortly. We are working to get the network back up quickly. Thanks for your patience. — Wormhole🌪 (@wormholecrypto) February 2, 2022 It’s no surprise. Crypto crime has been on the rise – especially since the pandemic began. How are these crimes committed? And…

“Holy sharks, Batman, it’s periodic!” I exclaimed on Slack. It was the first lockdown of 2021 in Perth, and we were all working from home. And when astronomers look for something to distract themselves from looming existential dread, there’s nothing better than a new cosmic mystery. In 2020 I gave an undergraduate student, Tyrone O’Doherty, a fun project: look for radio sources that are changing in a large radio survey I’m leading. By the end of the year he’d found a particularly unusual source that was visible in data from early 2018, but had disappeared within a few months. The source was named…

Sweat is a biological fluid — like blood, saliva and urine — that contains metabolites, electrolytes, proteins and hormones. The levels of these vary depending on a person’s health. Wearable sweat sensors have been developed to track users’ health condition and monitor the levels of these substances (known as analytes) in sweat. Lactate is considered an important biomarker thanks to its involvement in anaerobic metabolism. The undesired accumulation of lactate in muscles can result in fatigue, so changes in the concentration of lactate in sweat can be used to monitor fatigue. At Simon Fraser University’s Additive Manufacturing Laboratory, we have developed a…

Since its launch on Christmas day, astronomers have eagerly followed the complex deployment and unfurling of NASA’s James Webb Space Telescope – the largest to ever take to the skies. Right around the time this article is published, it’s expected Webb will have reached a place called the Earth-Sun “second Lagrange point”, or “L2”. This is a point in space about 1.5 million kilometres away from Earth (in the opposite direction from the Sun) where the gravity from both the Sun and Earth help to keep an orbiting satellite balanced in motion. Now the astronomical community – including my team of…

In recent weeks, a web-based word puzzle called Wordle has become a popular daily distraction. Suddenly, millions of people are focused on their vocabulary of five-letter words, and are newly aware of concepts like letter frequency and letter position as they strategize about the best opening words and faster solutions. For these people, Wordle is captivating. Previous research can help us understand how our brains respond to word games, and why we love them. Wordle is a single-player puzzle that combines elements of several games, including Scrabble and Battleship. My colleagues and I have studied Scrabble as a way of understanding how language is…

In 1979, a group of disgruntled Atari employees decided to quit and create their own company. Activision was the world’s first “third-party” game development company, producing and publishing titles for other companies’ platforms. Fast-forward 43 years and the company that is now Activision Blizzard has been bought by one of the major platform owners in the industry, Microsoft, for a blistering US$68.7 billion dollars (around A$95.6 billion) – the largest sale in the history of the video game industry. This sale is also massive in terms of the game franchises Microsoft now has control over; it now owns blockbuster franchises such…

South African space science had a big day on 13 January 2022. The Cape Peninsula University of Technology, based in Cape Town, launched its third satellite mission into space from the Cape Canaveral rocket launch site in Florida in the US. The nanosatellite constellation – consisting of three satellites – is called MDASat (Marine Domain Awareness). A nanosatellite is smaller than standard satellites, weighing between 1kg and 10kg; it’s an affordable, functional option. The mean mass of each of our satellites is 2.1kg. MDASat is designed to collect data that will enhance the security and protection of South African marine resources. The…

Several international airlines recently cancelled flights into certain US airports over concerns the rollout of 5G mobile communication technology could interfere with some planes’ equipment. After warnings about the potential problem from aviation bosses and the Federal Aviation Administration, telecommunications companies AT&T and Verizon delayed activating some 5G masts around US airports. But how could 5G interfere with planes? And can the problem be fixed? Let’s take a look. Currently being deployed in several countries around the world, 5G is the fifth generation of mobile phone technology. It could offer network speeds up to 100 times faster than what we’ve experienced with 4G. To ensure…