Oxygen was discovered for the first time by a SwedishChemist, Carl Wilhelm Scheele, in 1772.
That would be "Thomas Edison".
Often times teachers who teach science or a field of science such as Chemistry or Biology were at one time chemists, biologists, etc. And even if the teacher never has worked in the field, but only has taught, they can still be considered a scientist due to one definition that states: "A scientist is a person having expert knowledge of one or more sciences, especially a natural or physical science." This applies to teachers teaching a science subject, though it would obviously not apply to a teacher of a non-science subject.
Ethiopian born scientist who worked at NASA and developed the GPS system.
To become a scientist in any field costs into the hundreds of thousands of dollars. In the forensic field, undergrad, masters, and doctoral training will cost in the neighborhood of 250,000 dollars.
white overalls like on the bill