Nasa Ames Research Center planetary scientist Carol Stoker said the project's main objective was to understand the origin of life and life forms in extreme climates, which would help scientists understand life on Mars.
"We are interested in understanding all life at the origin of life. The environment we experience now was not here at the origin of life; there was no oxygen, no plants, no animals, and we have an interest in searching for evidence of life on Mars," she said.
"We formulate our experiment design by what we think we will find.
"We learn that by studying analog sites, and Rotorua is an analog site.
"We are not going to go home with the Holy Grail, but we learnt a lot," she said.
Nasa astrobiologist Sanjoy Som said rocks found in Rotorua's more extreme climates could reveal a lot about what life could be like on Mars.
"Rocks are the history books of the planet.
"In the rocks you find evidence of life. Early earth had nothing to do with life as we find it now, and if you can characterise early earth you can characterise other planets," he said.
Professor Pointing said Spaceward Bound would be presenting new curriculum material for NCEA curriculum developers including structured activities, following insights gained from this week's project.