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...Introduction - Welcome to this free course, The science of nuclear energy. In the following video, course authors Sam Smidt and Gemma Warriner introduce themselves and do some experiments with a Geiger counter to show radioactivity. SAM SMIDT Hello, and welcome to the course. I’m Sam Smidt. GEMMA WARRINER And I’m Gemma Warriner. Over the next four weeks, you’ll be...

...Introduction - This course looks at Babylonian mathematics. You will learn how a series of discoveries have enabled historians to decipher stone tablets and study the various techniques the Babylonians used for problem-solving and teaching. The Babylonian problem-solving skills have been described as remarkable and scribes of the time received a training far in advance of...

...Introduction The intention of this article is to provide some general knowledge about viruses, how they lead to infection and how the body’s immune system responds. Although tiny, viruses are complex, diverse entities that have the capacity to infect hosts, replicate themselves and then spread to additional hosts. In addition, viruses can sometimes transfer between host...