Science · Engineering & invention
Vance Oyama
Viking biology experiment investigator
Who they are
Vance Oyama was the principal investigator for Viking’s Gas Exchange experiment and a researcher at NASA Ames. His work translated a possible sign of metabolism into an automated test of gases released from Martian soil. Later papers examined the observed changes through chemical explanations, illustrating the difficulty of distinguishing biological activity from reactive surface chemistry.
His experiment is central to the timeline’s account of testing for life on another planet and interpreting ambiguous results.
Selected contributions
- Led the Gas Exchange investigation in Viking’s biology package.Source ↗
- Described the experiment before landing and coauthored a post-landing interpretation with B. J. Berdahl.Source ↗Source 2 ↗
Selected works
Academic paper · 1972 · Published journal article
The Gas Exchange Experiment for life detection — The Viking Mars Lander
Oyama outlines an automated gas-exchange experiment that would incubate Martian soil with nutrients and analyze gases above it. The abstract explains the instrument’s life-detection rationale before Viking landed.
Reading scope & citation
NASA catalogue abstract, author, NASA Ames affiliation and DOI. Indexed catalogue abstract inspected; direct page returned 403. The record states that no download is available.
DOI: 10.1016/0019-1035(72)90144-3
Academic paper · 1977 · Published journal article
The Viking gas exchange experiment results from Chryse and Utopia surface samples
Oyama and B. J. Berdahl report gases released from Viking soil samples and propose chemical explanations. Their interpretation shows why activity in a life-detection experiment did not by itself demonstrate living organisms.
Reading scope & citation
Complete NASA catalogue abstract, two authors, publication date and journal. Abstract and bibliographic record only. No full-text download is supplied.
In the timeline
- Jul 20, 1976Viking lands laboratories to test Martian soil
Biography sources
- Viking Project and Astrobiology ↗NASA Science
- The Gas Exchange Experiment for life detection — The Viking Mars Lander ↗Icarus; NASA Technical Reports Server
- The Viking gas exchange experiment results from Chryse and Utopia surface samples ↗Journal of Geophysical Research; NASA Technical Reports Server