#WHOI deep-sea biologist Tim Shank and ALVIN pilot Bruce Strickrott were exploring a deep-sea hydrothermal vent field along the East Pacific Rise (~200 miles off of western Mexico) when they turned off the vehicle lights and saw the vent chimneys silhouetted by a research camera system known as the MISO elevator. ALVIN is the only human-occupied submersible in the US capable of bringing three people as deep as 6500 meters, or nearly four miles! 📲Check out more mind-blowing milestones from ALVIN