The DEPTHX deep-water probe has successfully completed its first mission. The probe, which is funded, designed, and operated by a variety of different public and private institutions, created a successful map of the floor of the El Zacatón Cenote in eastern Mexico. It showed a sloping floor that goes from 270 meters deep at one end to over 300 meters at the other. The discovery means a previous human effort to explore the floor, which resulted in the tragic death of one of the explorers, came within just a few meters of success. It's possible the Cenote connects to other underground caves, an option the team hopes to explore during their next expedition.