Results 1 to 10 of about 102,836 (336)

Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites

open access: yesNature Communications, 2022
All DNA/RNA nucleobases were identified in carbonaceous meteorites. Having been provided to the early Earth as a component in carbonaceous meteorites, these molecules might have played a role for the emergence of genetic functions in early life.
Yasuhiro Oba   +2 more
exaly   +3 more sources

What Martian Meteorites Reveal About the Interior and Surface of Mars

open access: yesJournal of Geophysical Research E: Planets, 2020
Martian meteorites are the only direct samples from Mars, thus far. Currently, there are a total of 262 individual samples originating from at least 11 ejection events.
Geoffrey H Howarth   +2 more
exaly   +2 more sources

The Nitrogen Heterocycle Content of Meteorites and Their Significance for the Origin of Life

open access: yesLife, 2018
Carbonaceous chondrites are very primitive meteorites that are rich in carbon. They contain many soluble organic compounds, including nitrogen heterocycles.
Zita Martins
doaj   +2 more sources

The Willamette Meteorite [PDF]

open access: greenScientific American, 1904
n ...
Henry A. Ward
openaire   +4 more sources

Radon on Mars and the Moon derived from Martian and lunar meteorites [PDF]

open access: yesScientific Reports
The radioactive gas radon-222, a fluid and aerosol tracer in Earth’s lithosphere and atmosphere, can also reveal subtle rock physics processes in extraterrestrial environments, such as those involving water, but remains poorly constrained in planetary ...
Frédéric Girault   +7 more
doaj   +2 more sources

Microbial Populations of Stony Meteorites: Substrate Controls on First Colonizers

open access: yesFrontiers in Microbiology, 2017
Finding fresh, sterilized rocks provides ecologists with a clean slate to test ideas about first colonization and the evolution of soils de novo. Lava has been used previously in first colonizer studies due to the sterilizing heat required for its ...
Alastair W Tait   +2 more
exaly   +3 more sources

Extraterrestrial ribose and other sugars in primitive meteorites

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2019
Significance Ribose is an essential sugar for present life as a building block of RNA, which could have both stored information and catalyzed reactions in primitive life on Earth.
Nanako O Ogawa   +2 more
exaly   +2 more sources

The Meteorite of Migheï [PDF]

open access: bronzeNature, 1890
WITH reference to the interesting meteorite of Mighei, examined by M. Stanislas Meunier, I have not observed, in any of the notices I have seen, any statement as to whether the organic matter exhibited any traces of an organized structure. I would suggest that, if it has not already been done, it should be carefully examined to see if the carbonaceous ...
J. R. Hill
openaire   +3 more sources

Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2011
H James Cleaves   +2 more
exaly   +2 more sources

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