Dr Karl: Need to Know
Killer cat stats
A crunching of the numbers reveals some extremely sobering facts about the carnage caused by feral cats in Australia.
Tag: Dr Karl Kruszelnicki
Dr Karl: Need to Know
Indigenous Ice Age exodus
Today, all traces of where inhabitants once lived now lie beneath the waves.
Dr Karl: Need to Know
Drunk from the inside: Dr Karl explains rare auto-brewery syndrome
Amazingly, some people can manufacture alcohol inside their body from the food they eat – carbohydrates, to be specific. Some do it so well, they can raise their blood alcohol level to eight times the legal driving limit!
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
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
The science behind the tides
There are about 120 different possible tides each day. There are tides that happen once a day, twice a day, three times a day, four times a day, and so on.
Dr Karl: Need to Know
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.
Dr Karl: Need to Know
Why does your dog wag its tail?
Dr Karl uncovers the curious hidden meanings behind your dog’s tail wagging.
Dr Karl: Need to Know
Killer heat waves
Dr Karl investigates the growing global trend of heat waves, which have killed more Australians than all other natural disasters combined.