Karl Kruszelnicki

Karl Kruszelnicki

Karl Kruszelnicki is an author and science commentator.

Karl Kruszelnicki is an author and science commentator on Australian radio and television.

  • All you need to know about heat waves

    Future heat waves will be more extreme in temperature, happen more frequently, last longer and co...

    Excessive heat is especially harmful to elderly women, particularly those who live alone. Peter Macdiarmid / Getty Im...

    January 9, 2017
  • Exercise before breakfast to lose more weight

    If your New Year’s resolution is to drop a couple of kilos, here’s a tip.

    A 2010 study found benefits to training before eating in the morning. Credit: Geber86 / Getty Images If your goal is...

    January 1, 2017
  • Why is Earth’s axis shifting?

    Humanity has now burned enough fossil fuel to tip the planet slightly. Karl Kruszelnicki explains.

    We are only a little way into the 21st century, but signs of a warming planet are already evident around the globe: M...

    October 12, 2016
  • Glass shape affect wine smell and taste?

    The flavour may depend on the vessel you choose.

    We humans have drunk alcohol for thousands of years and that means we’ve had plenty of time to make different shapes ...

    October 10, 2016
  • Why do clouds float?

    They weigh hundreds of tonnes, but even dark clouds remain aloft.

    Clouds must have weight, because water has weight. A cloud is many, many tiny “clumps” of water, either liquid or fro...

    June 23, 2016
  • Why are some people have a lactose intolerance?

    Where you are born is the big influencer.

    Food can bring people together. But some foods can be a problem for dinner guests. A good example is milk, and the co...

    March 3, 2016
  • Why do people sneeze in sunlight?

    Nobody knows why some people sneeze in the sunlight.

    Around 350 BC, the great Greek thinker Aristotle tried to understand why sunlight would sometimes cause sneezing. He ...

    December 15, 2015
  • Why do we swear?

    Bad words cannot hurt us goes the old saying – and sometimes they can be beneficial, writes Karl ...

    Swearing is a powerful act that can relieve pain. – jessica peterson / jpm / getty images Swear words, or b...

    November 16, 2015
  • Why are children smarter than their parents?

    IQ test scores have been creeping upwards for a century, writes Karl Kruszelnicki.

    IQ tests indicate children are adapting well to a contemporary environment. – ShapeChange / Getty Images We...

    September 14, 2015

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