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An example of sterols found in plants. Sterols are a subgroup of the steroids, and are found in plants, animals, fungi, and some bacteria. Fossilized sterols can be preserved in sedimentary rock for billions of years.
Distinguishing Between Bacterial and Eukaryotic SterolsJuly 12, 2018
Adult <em>Schizocardium californicum</em>. Light micrographs. a Female. b Male. Dashed lines mark the boundaries between the main body regions. Scale bars: 10 mm
Life History Strategies in Benthic Marine InvertebratesJuly 11, 2018
As NASA missions explore our solar system and search for new worlds, they are finding water in surprising places.
Planetary Protection of Ocean WorldsJuly 10, 2018
This illustration shows the seven Earth-size planets of TRAPPIST-1. The image does not show the planets' orbits to scale, but highlights possibilities for how the surfaces of these intriguing worlds might look.
Exoplanet Science Flying HighJuly 9, 2018
Cells of tersicoccus phoenicis, a rare microbe found in clean rooms in South America and Florida. The latest microscopic technology can isolate individual microbes from their colonies, improving the search for life on other worlds in the future.
Electron Acceptors and Carbon Sources for a Thermoacidophilic ArchaeaJuly 5, 2018
Artist’s concept of interstellar asteroid 1I/2017 U1 (‘Oumuamua) as it passed through the solar system after its discovery in October 2017. The aspect ratio of up to 10:1 is unlike that of any object seen in our own solar system.
Theories on the Origin of an Interstellar Small BodyJuly 2, 2018
Artist's conception of what life could look like on the surface of a distant planet.
Will We Know Life When We See It?July 2, 2018
Artist concept of an asteroid breaking up.
Asteroid Remains Around Dead Stars Reveal the Likely Fate of Our Solar SystemJune 30, 2018
Fragments of the Sutter’s Mill meteorite fall collected by NASA Ames and SETI Institute meteor astronomer Peter Jenniskens in the evening of Tuesday April 24, 2012, two days after the fall. This was the second recovered find.
Rapid Alteration of MeteoritesJune 29, 2018
Lifting the Mars Exploration Rover-1 (MER-B) onto a spin table during preflight processing of the spacecraft. Researchers at Cal Poly offer the first biochemical evidence explaining the reason why contamination persist after use of the cleaning facility.
How Microbes From Spacecrafts Survive Clean RoomsJune 28, 2018
Image for Article 2
Photochemistry of Bacterial DNA under Mars ConditionsJune 27, 2018
Apollo 11 Commander Neil Armstrong working at an equipment storage area on the lunar module. This is one of the few photos that show Armstrong during the moonwalk. Click image to enlarge. Credit: NASA
The Potential for Metal Contamination in Apollo SamplesJune 26, 2018
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