> Aren't PhD students working long hours already? Depends highly on the field. I knew some materials science PhD students who were relatively well-funded to wo

> Aren't PhD students working long hours already? Depends highly on the field. I knew some materials science PhD students who were relatively well-funded to work in the lab (~$35k per year), but often spent nights and weekends baby sitting experiments. But there was no undergraduate materials science program, so no teaching! I was in the mathematics department where most people worked as teaching assistants for $22k per year (summer work available) but otherwise did as they pleased. I would maybe meet with my adviser for a few minutes per week? And after you've taught calculus five times, you can kind of coast.