Great Moments In Science

Dr Karl Kruszelnicki is fascinated by how bacteria rotate their flagellum counter-clockwise, much like a manmade electric motor. But unlike the motors that humans make, this dynamic microscopic molecular machine is constantly being rebuilt and reconfigured on the run.

Dr Karl Kruszelnicki explains the microscopic but super-high-tech gee-wizardry of some bacteria that use propellers powered by self tiny assembling electric motors to swim in their environment.

We're instructed to stop our cars before refuelling, but how dangerous is it really? Dr Karl Kruszelnicki dispels some myths while staying on the safe side.

There are two pretty tense moments in Hunger Games: Mockinjay, and scientists know this just from the chemicals given off by the audience who watched the film. Dr Karl Kruszelnicki explains how a shared scary cinema experience led to a fundamental discovery about human biology.

Down through the ages, there have always been myths about immortality—that god-like ability to live forever. Marine biologists found a creature that comes closest to immortality—a tiny transparent jellyfish. Dr Karl Kruszelnicki explains.

If you buy a lottery ticket every time you get a double-yolk egg because you're having a lucky streak you'll be disappointed to learn it's not as uncommon as we'd made to believe, as Dr Karl Kruszelnicki explains.

There is a growing body of evidence that coffee can have good effects our health but it's not a magic potion. Dr Karl Kruszelnicki looks at the evidence.

There is a body of evidence that some of the side effects of coffee may actually be good for you, and they appear to have nothing to do with caffeine. But Dr Karl Kruszelnicki's grind is the observational studies that make up the 'statistics' behind the health benefits.

The way we spend money is changing with electronic transactions and new 'strange' currency like Bitcoin, but security is important and mathematics central to that, as Dr Karl explains.

The strange new virtual currency called Bitcoin relies on something more trustworthy than people or institutions. It relies on mathematics—in fact, 'trusty' one-way mathematics.