Along the way, you will explore the properties of milk of magnesia and vinegar. Stir until a vortex (or “tornado”) forms. The stirrer will need to keep stirring throughout the activity. While stirring ...

My friend Wally and I have a fractious relationship. This is no secret. Wally has said he thinks optimistic people like me are self-deluded, always looking for reasons to be happy when there is a ...