To control the COVID-19 pandemic through random testing would require about 6.5 million test a day. Using group testing and machine learning could get that number down to fewer than 40,000 day.
The best option is for infected people to be admitted to hospitals or other suitable health facilities. This will help prevent transmission within families.
As Melbourne returns to lockdown, the evidence suggests routine mask-wearing - as seen in many countries but not so far in Australia - could be a valuable tool to help stop the spread of COVID-19.
As the planet continues to warm, extreme weather events such as heatwaves and heavy rainfall are becoming more frequent, intense and longer, according to global weather data.
As the world warmed from the last ice age, a rise in carbon dioxide levels stalled for nearly 2,000 years. That's always puzzled scientists, but now they think they know what happened.
In an open letter to Attorney-General Christian Porter, more than 500 women working in the law from across Australia have sought changes to the way judges are disciplined and appointed.
