Interesting Things with JC #560: "Great Balls of Fire" - Have you ever heard of ball lightning? This mysterious phenomenon is still not fully understood by scientists.

Interesting Things with JC #275: "The First Colour Photograph” - On May 17th 1861 Scottish physicist James Maxwell revealed the first colour photograph at King's College in London. The photo is actually a composite of three black and white pictures, each taken through a red, green and blue filter. The images were overlayed through projection of three similarly filtered lenses, which resulted in display of a colour photograph.

Interesting Things with JC #270: "Caves of Monte Castillo" hold one of the most impressive archeological findings related to our human history. The El Castillo cave is home to Paleolithic paintings on the walls that are at least 40,800 years old. This discovery of the oldest dated cave painting is approximately 4000 years older than the paintings discovered in the Chauvet Cave in France, which were previously believed to be the oldest cave paintings.

Interesting Things with JC #254: "Arctic Circle Daylight". In summertime, the sun is always above the horizon at the North Pole, circling the Pole once every day. It is highest in the sky at the Summer Solstice, after which, the sun starts to sink towards the horizon, until it falls below the horizon, at the Fall Equinox.

Interesting Things with JC #239: "Traffic Lights" - Most common traffic lights operate based on timers. In areas that are not as congested, timers are not the best idea, as rural drivers may be sitting at a red light for an extended period of time. This is where sensor based traffic lights are more of an advantage. The actual sensors used can vary greatly per location, they could be lasers, rubber hoses filled with air, video cameras or inductive loops.