#148 What is a tokamak?
I learned this today. A tokamak is a device that uses a strong magnetic field to keep a gas plasma in a donut shape in order to achieve nuclear fusion.…
I learned this today. A tokamak is a device that uses a strong magnetic field to keep a gas plasma in a donut shape in order to achieve nuclear fusion.…
I learned this today. The Bronze Age started because people discovered that combining copper and tin made a stronger alloy called bronze. In the three-age system of the world that…
I learned this today. Gas masks work by blocking bacteria and viruses, or by absorbing or altering chemicals. Gas masks have to be effective against bacterial, viral, and chemical agents.…
I learned this today. The Portuguese royal court moved to Brazil in 1807 to avoid being deposed by Napoleon. Spain and Portugal both started exploring the Southern Americas from the…
I learned this today. There are two ways to work out the age of the universe. The first is to calculate the age of the oldest stars. The second way…
I learned this today. The first drink put in a can was beer in the 1930s, but it took a while before drink canning could be perfected. The process of…
I learned this today. Venus and Uranus spin in the opposite directions to the other planets possibly because Venus flipped over and Uranus was hit by another planet. Our sun…
I learned this today. The different rocks of Stonehenge came from three different places. Stonehenge was probably built between 3000 and 2000 BC. Originally, it was constructed with wood. Wooden…
I learned this today. Erasers work because of friction. They become sticky when they are hot and hold onto the graphite particles. Before we look at how erasers work, I…
I learned this today. There have been six mass extinctions on Earth that experts know about. The Great Oxidation Event about 2.4 billion years ago. The Ordovician-Silurian Extinction 440 million…