The Conversation

Astronomers have found evidence of a giant void that could be the largest known structure in the universe. The “supervoid” solves a controversial cosmic puzzle: it explains the origin of a large and anomalously cold region of the sky. However, future observations are needed to confirm the discovery and determine whether the void is unique.

Coaxing teenagers to sit down and do their homework is never an easy task. But is it actually worth their while to slave away for hours on end every evening? Not according to a new study of Spanish secondary school students which has concluded that the optimum amount of homework for children is around one hour a day.

There is an old saying that A lie can travel half way around the world while the truth is putting on its shoes. This was brought home to me during a radio interview I did on Tuesday night in the wake of the Federal Government’s decision to remove the conscientious objection exemption for vaccination. I was astonished that in 2015, some of these pieces of misinformation are still out there, and still believed, if the passionate radio callers (and several posts in my Facebook feed) are any indication.

Surveying news headlines in recent years, it seems that cheating is rampant.In the athletic arena, Lance Armstrong was stripped of his seven Tour de France titles for using performance-enhancing drugs. In business, some of the world’s largest banks have paid nearly $200 billion – the equivalent of the GDP of New Zealand – in fines over the past six years for cheating.

Astronomers and planetary scientists have been waiting with bated breath for the first detailed close-up images of Ceres, the solar system’s largest asteroid. Now, with NASA’s Dawn spacecraft approaching closer each day, tantalizing new color imagery has revealed new details of the geological processes that formed Ceres.

In a music buying industry now dominated by iTunes and music streaming sites such as Spotify, Napster, Pandora and Jay-Z’s recently released Tidal, the CD and physical music store are reportedly in sharp (and potentially terminal) decline. But a curious development in music consumption has seen vinyl, the format ostensibly rendered extinct by the compact disc with its “perfect” digital sound, make an unlikely, but significant cultural and commercial comeback.

Most people believe – and have been told by health professionals – that it’s essential to finish a course of antibiotics to prevent antibiotic resistance. But this advice is not only wrong, it could actually be harmful.

Since it was revealed that Andreas Lubitz – the co-pilot who purposefully crashed Germanwings Flight 9525, killing 150 people – had been treated for psychiatric illness, a debate has ensued over whether privacy laws regarding medical records should be less strict when it comes to professions that carry special responsibilities.It has been widely argued that Germany’s privacy laws were to blame for the tragedy. The Times, for example, headlined an article: “German obsession with privacy let killer pilot fly.” Similarly, another article published in TIME said “German privacy laws let pilot ‘hide’ his illness from employers.”

Climate change and the loss of biodiversity are two of the greatest environmental issues of our time. Is it possible to address both of those problems at once?In Australia, farmers and landholders will this week be able to apply for payments through the Federal government’s A$2.55 billion Emissions Reduction Fund. Bidders can request funding for projects that reduce emissions using agreed methods, which include approaches relevant to the transport, waste and mining sectors, as well as the land sector: for example, by managing or restoring forests.

Shaved heads have come in and out of fashion over the past few decades, but some people don’t have the option of allowing their locks to grow. Thankfully, for those who do suffer from hair loss, or alopecia, help may be at hand. Somewhat counter-intuitively an effective treatment for baldness may come from plucking a certain number of hairs – in a specific formation – from the scalp.

The tragic death recently of a young Queensland boxer raised the question of safety in the sport and whether boxing should be banned.Claims that boxing is safer than a number of very popular and well-accepted sports warrant careful scrutiny as they often derive from overly simplistic analyses.The risks associated with boxing should never be trivialized, but science and technology could possibly help to mitigate them.

The cost of batteries is one of the major hurdles standing in the way of widespread use of electric cars and household solar batteries. By storing surplus energy, batteries allow households to reduce power bought from the electricity grid. Unfortunately, batteries have so far been prohibitively expensive.But research published recently in Nature Climate Change Letters shows battery pack costs may in some cases be as low as US$300 per kilowatt-hour today, and could reach US$200 by 2020. This cost development is notably cheaper and faster decreasing than I and many others expected.