Need To Know with Dr Karl
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.
Category: Need To Know with Dr Karl
Need To Know with Dr Karl
Earth’s mega mountains
Earth’s biggest mountain range is one very few of us will ever see.
Need To Know with Dr Karl
What would happen if our planet stopped spinning entirely?
This is what the world would look like if earth stopped spinning.
Biodiversity
Popular sunscreen chemical can kill baby corals
Consider wearing zinc or covering up next time you’re snorkeling, says Dr Karl – one popular sunscreen chemical can be toxic for baby corals.
Need To Know with Dr Karl
Could cows produce strawberry-flavoured milk?
We do know cows’ diets affects the flavour of their milk.
Need To Know with Dr Karl
Dr Karl: The truth about Uluru
The phrase ‘world’s largest monolith’ makes a nice story for tourists visiting Australia’s iconic Uluru. Just don’t say it near a geologist.
Need To Know with Dr Karl
Killer heat waves
Dr Karl investigates the growing global trend of heat waves, which have killed more Australians than all other natural disasters combined.
Need To Know with Dr Karl
The thorny devil lizard’s drinking habits
How the thorny devil takes “flat out like a lizard drinking” to the extreme.
Need To Know with Dr Karl
The Australian pedestrian button
Dr Karl’s ode to the ergonomic and elegant design of the pedestrian button.
Need To Know with Dr Karl
The Fred Hollows Foundation’s Arclight
Dr Karl looks at how the Foundation’s portable and cheap ophthalmoscope is helping save lives and prevent avoidable blindness across the developing world.