I do atmospheric science.

I can commute 10 miles down the bike path and 2 miles across Cambridge to get here. That's kind of a long haul in the evening in the dark, so tonight I will try putting my bike on a bus rack for part of the trip. I can make the whole trip on the bus if need be, but with infrequent service to my town. I've also tried the commuter rail, which is 6-7 miles from my house. Good to have options, though I expect to bike most of the time.