Questions with the keyword 'how long'

• How long have you been studying children’s brains? by dan7 to Tim Comments: (No comments so far )
• How long do you work? by scientisteco and 3 others. to Suzi, Tim, Damien, Rachael Comments: (No comments so far )
• how long have you been a scientist? by oliviaeganx and 7 others. to Damien, Rachael, Simon, Suzi, Tim Comments: (No comments so far )