I am supossed to an informative speech the week after the next. I do not know what to talk about. It should be engineering related and something that people have no clue. I wantd to talk about cars but someone else alreadyu talked about it. Any ideas?

Vikta, please start your own post. When you piggyback onto someone else's thread, all it gets is confusing. If someone does respond to your question, it passes over the original question and poster.