Is 5G Safe? What the Science and Australia’s Regulator Say
5G has been running in Australia for several years now, but the questions surrounding it have not gone away. When the network first switched on, worries about radiation followed almost…
Why Do We Dream? The Main Theories, and What Science Says
Dreams can be bizarre, frightening, funny, familiar or completely impossible. They stitch together people and places from different parts of your life, and sometimes you wake with the feeling that…
What Is a Rainbow? The Science You Can Test in Your Backyard
Here is a simple experiment to try on a sunny afternoon. Stand with your back to the sun, set a garden hose to a fine mist and spray the water…
What Is Brain Freeze? Why Ice Cream Hurts Your Head
You take a big bite of ice cream or gulp down a frozen drink, and suddenly a sharp pain shoots across your forehead. That is brain freeze, also called an…
Red Sky at Night, Sailors’ Delight: Is It True in Australia?
“Red sky at night, sailors’ delight. Red sky in the morning, sailors’ warning.” Long before weather apps, people forecast the weather by looking up, and this rhyme is one of…
When Will the Sun Die? Its Age, Its Future and Our Fate
The Sun has been rising every morning for longer than there has been anyone to watch it, so it is easy to think of it as permanent. But like every…
What Is Static Electricity? And Why You Get Zapped
You walk across the carpet, reach for a door handle, and zap. Or you slide out of the car on a dry day, touch the door, and get a sharp…
Why Is the Sky Blue? And Why Is It Red at Sunset?
Look up on a clear day and the sky is an enormous blue dome stretching from horizon to horizon. Yet there is nothing blue about sunlight itself; it looks white,…