I've been traveling for the last couple of weeks. One key stop: Woods Hole, Mass., where I got up close and personal with everybody's favorite research submarine. Originally commissioned in 1964, Alvin is currently disassembled as part of a regular maintenance inspection and overhaul. I got to go behind-the-scenes to check out Alvin and the RV Oceanus—a research ship also operated by the Woods Hole Oceanographic Institute. This is a window on Alvin's old manned pod, a massive sphere that can hold two scientists. It's being replaced in the current retrofit, and this sphere will go to the Smithsonian. More photos to come ...