Endurance is on a historic run. During our mission to the Axial Seamount, we successfully drilled the world’s first subsea geothermal well and generated net-positive power a mile beneath the Pacific. This mission was the first end-to-end test of subsea geothermal, and our fifth deep-sea deployment in just over a year. For three weeks, we worked around the clock over an active underwater volcano, running the drill and generator and handling every deployment and recovery. Along the way, we: - Landed our drill within feet of target, drilled two holes, and cased and completed the second as a geothermal well, flowing at 260°C. - Landed Adélie, our 3-ton test plant, and ran it in real time from Seattle over subsea fiber. - Drilled with filtered seawater, not drilling mud, and monitored the site on every dive. - Recovered, serviced, and redeployed Adélie in about 16 hours. - And on Sept. 27, connected to a 281°C natural vent, spun the turbine up to 26,000 rpm and ran the plant net positive for 8.7 seconds, peaking at 16.5 kW. Net power is the threshold every new energy source has to cross. For Endurance, it proves subsea geothermal is real, and gives us the confidence to keep sprinting towards commercial scale. With a test like this, success comes from what we learn: a battery protection trip ended the run, a pump cable failed on restart, and the new well was too restrictive to run the plant. Those lessons go straight into Gentoo, our next test plant, this winter and Leopard, our 2 MW commercial generator. We’re incredibly proud of what we accomplished together. It took creativity, precision, an uncompromising focus on safety from everyone on board, and it’s only the beginning of what we’re capable of. We couldn’t have done it without Stabbert Maritime and the crew of the Ocean Guardian, the ROPOS team, the University of Washington, WASSOC, and the National Science Foundation.

@Sclarsic is co-founder of @VoyagerVC, an early-stage VC firm investing in ClimateTech. Previously, she co-founded carsharing company @Getaround, researched carbon removal @MIT, and built bio-based leather @ModernMeadow. She advises on climate research @ Frontier & @HomeworldBio

We’re thrilled to announce Voyager Select I, our $100M opportunity fund. We’re as high conviction as it gets that the most important - and valuable - companies created this century will be those building the foundations of a decarbonized global economy, from energy to transportation to finance. These are massive global markets. With Voyager Select I, we're looking forward to doubling down on climate tech companies - software and hardware alike - poised for scale. An enormous thank you, as always, to the company founders and builders creating a sustainable world for us all. It is a privilege to support you on your journeys. We are grateful to Voyager's terrific LPs, and proud to welcome Novo Holdings and Northwestern University to the Voyager community. Thank you to @BusinessInsider for covering our Select I announcement. businessinsider.com/climate-…