There's a nice lecture from Dan Gelbart that discusses things that people thought were impossible, until they were invented: https://www.youtube.com/watch?v=7Z

There's a nice lecture from Dan Gelbart that discusses things that people thought were impossible, until they were invented: https://www.youtube.com/watch?v=7ZeBWJLRXqM https://www.youtube.com/watch?v=7ZeBWJLRXqM Creative solutions to impossible engineering problems