Sara Walker, assistant professor at Arizona State University. Credit: BEYOND, ASU
Astrobiologist Sara Walker is exploring ways to measure the transition from non-living to living matter. Her approach could broaden our understanding of how unique—or common—life might be in the Universe.
The story of life’s origin is one of the great unsolved mysteries of science. The puzzle boils down to bridging the gap between two worlds—chemistry and biology. We know how molecules behave, and we know how cells work. But we still don’t know how a soup of lifeless molecules could have given rise to ...
Early Career Seminar: Paula Welander
Hopanoid Biosynthesis and Function in Methanotrophic Bacteria
Paula Welander of Stanford University will be presenting the next Early Career Seminar on April 7, 2014, at 11am PDT. Welander studies molecular fossils in order to better understand how microbial communities in the past altered the Earth’s surface environment and impacted life’s evolution on our planet.
Details of Welander’s upcoming talk can be found here.
Source: [Early Career Seminars]March 31, 2014 / Written by: Aaron Gronstal
Earth’s thin atmosphere is all that stands between life on Earth and the cold, dark void of space. Credit: NASA
The next Early Career Seminar will be presented on April 14 by Mark Claire of the University of East Anglia. Claire will present research undertaken as a member of the NASA Postdoctoral Program (NPP). His work focuses on the atmospheric composition of the early Earth, and identifying constraints beyond the absence of oxygen.
Claire’s talk is part of a series of seminars where NASA Astrobiology NPP Fellows who have completed their fellowships present their results. Please join us ...March 16, 2014 / Written by: Aaron Gronstal
Photo of RAD flight model in the lab (left) and an artist's impression of the Curiosity rover on Mars. Credit: NASA / JPL
Scientists have published the first thorough analysis of radiation readings from the surface of another planet. Using its Radiation Assessment Detector (RAD), NASA’s Curiosity rover measured radiation exposure during its journey to Mars, and the amount of radiation present at the planet’s surface.
Radiation and its variations impact not only the planning of human and robotic missions, but also the search for extraterrestrial life. Without substantial atmospheric protection, powerful particles entering the air can penetrate ...
The image to the left shows Jennifer Glass working in a chamber where she can control the oxygen levels to mimic the deep sea environment. On the right is an example of marine gas hydrates on the sea floor. Credit: Rob Felt (left image); US Department of Energy (right image)
On March 3, 2014, Dr. Jennifer Glass of the Georgia Institute of Technology (GA Tech) will present the second in our series of talks from alumni of the NASA Astrobiology NASA Postdoctoral Program (NPP). In her talk, “Microbes, Methane and Metals: Insights From Geochemistry, Omics and Single Cell Imaging,” Glass ...February 11, 2014 / Written by: Aaron Gronstal
Voyager Views Titan's Haze. There is a lot of interesting chemistry occurring in Titan's dense atmosphere. Credit: Voyager Project, JPL, NASA
Henderson (Jim) Cleaves of the Carnegie Institution of Washington will present the next talk in the NAI Director’s Seminar Series on February 10 at 11:00 AM PST.
Amino Acid Analysis of Titan Tholins and Comparison With Other Prebiotic Reaction Systems
Titan’s atmospheric chemistry produces a host of discrete organic chemical products. It is likewise well known than Miller-Urey type reactions produce a host of complex discrete organic products. We have examined various complex reaction ...February 4, 2014 / Posted by: Aaron Gronstal
As we are rapidly approaching the end of the end of this stage of the Astrobiology Strategy planning, we would like to thank everyone that has participated as a presenter or author, commented on a white paper or at a webinar, or even just listened in to one of the presentations. If you have not yet had the opportunity to listen to a particular webinar or comment on a particular white paper, they are all available on the website astrobiologyfuture.org. However, please visit the website soon, as we will be closing the papers to comments on Friday, February 14th ...February 1, 2014 / Posted by: Aaron Gronstal
A TextureCam analysis of a Mars image is able to distinguish rocks from soil. Credit: NASA/JPL/Caltech/Cornell
Researchers supported by the ASTID element of NASA’s Astrobiology program are designing algorithms and instruments that could help future robotic missions make their own decisions about surface sites to explore on other planets. One such instrument is the TextureCam, which is currently being tested with Mars in mind. The technology will improve the efficiency of planetary missions, allowing rovers to collect more data and perform more experiments in less time.
“Roughly speaking, instead of telling the rover to “drive over ...January 23, 2014 / Written by: Aaron Gronstal
Panels from Astrobiology: The Story of our Search for Life in the Universe, Issue #4. Credit: NASA Astrobiology
Issue #4 maintains the gorgeous look and feel of the series, and continues the captivating story of Exo and Astrobiology. This installment explores astrobiology’s role in missions to the outer Solar System. See how science helped shape the exploration of gas giants and icy worlds beyond our system’s main asteroid belt.
While spacecraft plied the distant corners of ...January 21, 2014 / Posted by: Aaron Gronstal
Sara Walker, assistant professor at Arizona State University. Credit: BEYOND, ASU
On February 3, 2014, Sara Walker of Arizona State University (ASU) will present the first in a series of seminars from alumni of the NASA Astrobiology NASA Postdoctoral Program (NPP). In her talk, “Information Hierarchies, Chemical Evolution and the Transition From Non-Living to Living Matter,” Walker will discuss topics related to the emergence of life… and how to define ‘almost life.’
Sara Walker is an assistant professor at the BEYOND Center in the School of Earth and Space Exploration at ASU. Walker specializes in theoretical physics and astrobiology, and ...January 17, 2014 / Written by: Aaron Gronstal
Dr. David Grinspoon delivered the 2013 Carl Sagan Lecture presented at the American Geophysical Union meeting in San Francisco. An outgrowth of his work as the first NASA—Library of Congress Baruch S. Blumberg Chair in Astrobiology, the talk is entitled “Terra Sapiens: The Role of Science in Fostering a Wisely Managed Earth.”
Click here to watch a video of Dr. Grinspoon’s lecture.January 13, 2014 / Posted by: Aaron Gronstal
This mosaic of images from the Mast Camera (Mastcam) instrument on NASA's Curiosity Mars rover shows a series of sedimentary deposits in the Glenelg area of Gale Crater, from a perspective in Yellowknife Bay looking toward west-northwest. Image Credit: NASA/JPL-Caltech/MSSS
Six new papers outlining science results from NASA’s Curiosity rover on Mars have been published in the journal Science Express. Talks on the results were also given during the 2013 Fall Meeting of the American Geophysical Union (AGU), held in San Francisco from December 9-13.
The papers provide valuable information for astrobiologists who are attempting to ...December 18, 2013 / Posted by: Aaron Gronstal
NASA’s Curiosity Rover landed on Mars a little over a year ago, and results from its first four months of data collection have now been published in the journal Science.
Five articles outline numerous findings from Curiosity’s suite of instruments, including data from Sample Analysis at Mars (SAM) and Chemistry & Mineralogy X-Ray Diffraction (CheMin). The studies will help astrobiologists understand past and present environmental conditions on Mars.November 4, 2013 / Written by: Aaron Gronstal
Lab demonstration of the measurement chamber inside the Tunable Laser Spectrometer, an instrument that is part of SAM on NASA’s Curiosity rover. Image Credit: NASA/JPL-Caltech
New results from the Sample Analysis at Mars (SAM) investigation on NASA’s Curiosity rover have been reported in two papers in the journal Science. Curiosity has been using SAM to study the atmospheric composition on Mars, and is revealing new clues about how the planet lost much of its original atmosphere.
The findings come from atmospheric samples collected in the first 16 weeks of Curiosity’s mission. The samples were analyzed with ...September 3, 2013 / Posted by: Aaron Gronstal
Zoë is equipped with a one-meter drill to search for subsurface life. It’s about 9 feet long and 6 feet wide, and has a solar array atop its body, generating power with high-efficiency gallium arsenide solar cells.
A rover named Zoë recently traveled to the dry, harsh terrain of Chile’s Atacama Desert. Equipped with a drill, cameras, spectrometers and other sensors, Zoë spent two weeks analyzing the soil from above and below the surface, providing valuable data for future missions to Mars.
Astrobiology Magazine has exclusive coverage of the project.
This recent excursion with Zoë is part of ...