Results 251 to 260 of about 79,885 (286)

Multi-technique characterization of iron reduction by an Antarctic <i>Shewanella</i>: an analog system for putative Martian biosignature identification. [PDF]

open access: yesAppl Environ Microbiol
Shaffer JMC   +9 more
europepmc   +1 more source

Martian chronicler

Science, 2020
NASA's Perseverance rover aims to find out whether ancient Mars was warm and wet or cold and dry.
openaire   +2 more sources

Martian Structures in Modern Science Fiction and the Home of the Martian (The Martian)

2023
Science fiction is a gateway to alternative realities that can be conceptualized with imaginary scientific and technological advancements. Therefore, it usually takes inspiration from grounded and realistic impressions. The evolution of classical science fiction towards modern science fiction entails an increasing diligence towards scientific accuracy,
openaire   +1 more source

martians?

2020
This chapter analzyes the collective thinking about Mars that has been shaped by two centuries of gradually improving astronomical observations of the red planet. It mentions several generations of astronomers that used their increasingly powerful telescopes to map the surface of Mars from the late seventeenth century into the mid-nineteenth century ...
openaire   +2 more sources

No ‘nanofossils’ in martian meteorite

Nature, 1997
Elongated, segmented forms found on fracture surfaces within the martian meteorite ALH84001 have been proposed to be martian ‘nanofossils’1, even though they appear too small to be fossilized bacteria2,3,4. We have examined similar forms and find that the majority are (non-biological) lamellar growth steps on pyroxene and carbonate crystals.
J. P. Bradley   +5 more
openaire   +2 more sources

Timing of the Martian dynamo

Nature, 2000
On Mars, the strong magnetization in the highland crust of the southern hemisphere and the absence of magnetic anomalies at the Hellas and Argyre impact basins have been taken as signs that the core dynamo that once drove the planet's magnetic field turned off more than 4 billion years (Gyr) ago. Here, we argue instead that the Martian dynamo turned on
G, Schubert, C T, Russell, W B, Moore
openaire   +2 more sources

Home - About - Disclaimer - Privacy