Stepping up the level of complexity for myself here. In this I ask three quiz questions before reading the New Scientist article. This is a great way of teaching some science, but it does make conceptual errors in the article really stand out. Here the author has not really understood the Terminator orbit. Sorry this didn't upload first of, this is due to a space in front of the file name, so I will get in and error trap this. MP4 recording     MP3 recording -- -- Your browser does not support the audio element.