I live in the USA and am a retired engineer/physicist. I volunteer at the local Museum Of Science and enjoy helping curious people who are trying to understand the world and life, like I am.

I do not answer questions that can be easily googled or look like they comes from homework. I will only answer questions that are obviously unique and come from a curious person.

Most people will not answer your homework questions. If you have a legitmate question that you are curious about, write more than one sentence and we will take it seriously.