OK, so I am not quite ready to post my pics of the scale model carronade, and the number of hits and likes on this site is plummeting, so I am re-posting someone else’s video to retain your interest. This is interesting!
Mercury has a melting point of -38 celsius, and a boiling point of 356 celsius. It is 13.6 times as dense as water. It is the only metal which is liquid at room temperature.
Mercury is very poisonous. However it is a component of dental amalgam, used in tooth fillings, but it is calculated that you would need 490 fillings to reach toxic levels. I hope so.