A scientist intently looks through a microscope in a laboratory .
A scientist is making a discovery in his lab and is looking intently in his microscope .
A scientist intently looks through a microscope in a laboratory.
A scientist is making a discovery in his lab and is looking intently in his microscope.
The scientist is looking at the microscope but don't know if he has made a discovery.
The scientist is looking at the microscope but do n't know if he has made a discovery .