Cannibalistic behaviour has been observed in many animal species — and, for most of history, in humans as well. What changed? Dr Karl Kruszelnicki investigates.
The gold in a Nobel Prize medal is dense enough to make a big impression when you try to take it through an airport X-ray scanner. It's also very resistant to being dissolved—but that didn't stop one chemist who needed to hide two medals from the Nazis, as Dr Karl Kruszelnicki explains.
A condition called misophonia — where people adversely react to particular sounds, often with feelings of rage, terror, fear and panic — was first identified 20 years ago, but is only now starting to be better understood, as Dr Karl Kruszelnicki writes.
They can seal tight, suck, blow, whistle, hold and kiss. With hundreds of muscles and multiple layers of cells, the human lip serves a much greater role than we give them credit for, as Dr Karl Kruszelnicki explains.
For 50 years air conditioning in commercial buildings has been set using the Standard 55 guidelines. But many workplaces aren't staffed solely with 40-year-old men dressed in suits, and that leaves women out in the cold, as Dr Karl Kruszelnicki argues.
From the formation of Earth until now, many factors have contributed to its changing state. But humankind has been a major contributor in a relatively very small period of time, as Dr Karl Kruszelnicki argues.
In one part of Venezuela, there are lightning storms almost 300 nights each year, producing skies so bright that navigators once used them as a lighthouse. So could lightning be used to power the planet instead of fossil fuels? Karl Kruszelnicki finds out.
