I’m Ken Kuwako, a science trainer. Every day is an experiment. “Why does it come back when you throw it?” Anyone who sees a boomerang for the first time asks that exact question. And it turns out the answer involves not one but several layers of physics — the same science behind airplane wings and […]

I’m Ken Kuwako, a science trainer. Every day is an experiment. There are things we cannot see with our eyes, yet they definitely exist. One of them is “electric current.” Turn on a switch and a light comes on. A motor starts spinning. But what exactly is electric current? After learning circuit diagrams, the next […]

I’m Ken Kuwako, a science trainer. Every day is an experiment. Why Do Your Feet Go Numb from Kneeling? The Science Behind the “Cross Your Legs” 10-Second Fix If you’ve ever sat in seiza (the traditional Japanese kneeling position) for any length of time — at a funeral, a tea ceremony, or a formal dinner […]

I’m Ken Kuwako, the Science Trainer. Every day is an experiment. When you’re playing in a park, you might stumble upon hidden treasures of mathematics and physics in the most unexpected places. The other day, a familiar piece of playground equipment caught my eye. It traced a beautiful spiral path through space. At first glance, […]

I am Ken Kuwako, a science trainer. Every day is an experiment. In a pitch-black room, a glass tube glows softly. Blue, pink, orange… like shifting aurora light. This is neither special lighting nor CG. It is a physics experiment in which the color changes depending on the degree of vacuum. In this article, we […]