Salah Kouhen

In this blog, I wanted to trace the history of how we came to know three neat facts about the motion of the planets. These three facts are known as Kepler’s laws, and they are rather beautiful observations that led to the development of classical physics. We will wander

While I was in the library, staring into my hands, wondering why I thought a PhD was a good idea, I noticed something for the first time.  My fingerprints were symmetric between hands. Looking closer, I could tell that the details of the valleys and ridges differed between the fingers,

Galileo Galilei was the first person to observe the moons of Jupiter. He saw objects in the sky that clearly orbited something other than the Earth. This observation can lead to a radical thought: Could the Earth be like those moons, could the Earth be orbiting something? Galileo was persecuted

There has been a lot of talk of carbon capture recently since it appears we will not be able to slow down burning fossil fuels anytime soon. So far humans have released 2500 billion tonnes of CO2 into the atmosphere since heavy industrialisation began. I just wanted to think a

You have likely seen this marketing phrase on disinfectant before, but what does it mean? Does it mean that of all the germs that exist, the product can kill 99.9% of the varieties?  Not quite. Let’s indulge a little and dive into this. First of all, what’s