Dr Karl: Need to Know
Dr Karl: Yes, humans are stardust
The Joni Mitchell song “Woodstock” has the following, surprisingly accurate, lines: “We are stardust, we are golden, we are billion-year-old carbon”.
Category: Dr Karl: Need to Know
Dr Karl: Need to Know
Dr Karl explains the ‘Wobbling Scale’ of animal drunkenness
Surprisingly, rotting fruit can ferment and reach a level of 4 per cent alcohol – close to, but not quite, the 5 per cent of beer.
Dr Karl: Need to Know
What are atmospheric rivers?
Although they’ve been around for millennia, atmospheric rivers were only discovered by humans during the past 25 years.
Dr Karl: Need to Know
Dr Karl’s message to flat-Earthers
It’s amazing that in the 21st century there are people who believe Earth is flat!
Dr Karl: Need to Know
Need to know: Bird poo hue
Why is most bird poo white, even though birds eat food of many different colours?
Dr Karl: Need to Know
The Min Min Mystery
An Australian neuroscientist has solved the mystery of Min Min lights.
Dr Karl: Need to Know
A quick guide to help you understand coral bleaching
Here, Dr Karl explains the number one problem facing our Great Barrier Reef: coral bleaching caused by climate change.
Dr Karl: Need to Know
How Aussie scientists used cane toads to confirm pregnancies
Cane toads are one of Australia’s most notorious pests, but back in the day Australian scientists found ways to make them useful.
Dr Karl: Need to Know
Earth’s mega mountains
Earth’s biggest mountain range is one very few of us will ever see.
Dr Karl: Need to Know
What would happen if our planet stopped spinning entirely?
This is what the world would look like if earth stopped spinning.