Calm seas on the equator during the research expedition of the R/V Knorr.
The scientific crew worked 12 hour shifts for 42 days aboard the Knorr.
The research vessel Knorr anchored in Costa Rica.
A 10-foot (3 meter) core of the seafloor comes aboard the R/V Knorr. Scientists analyzed the oxygen levels inside the sediment to measure the metabolisms of microbes inside.
A 98 foot (30 meter) core pulled from the seafloor. Photo by Hans Roy.
Hans Roy guides a sediment core on board on another research voyage.
An example of a core sample (this one with sediment dating back to the Ice Age).
Researcher Hans Roy opens a sediment core (not taken on the R/V Knorr expedition). The sediment in the core has not seen the sun for 10,000 years.