Cracking up: faulting on Earth and Mars

Sand Dunes on Mars and on Earth

Simultaneous ionospheric variability on Earth and Mars

[1] Ionospheric physics deals with the basic structure and variability of plasma within the upper atmospheres of the Earth and planets. Comparative studies foster both exploration and synthesis within diverse settings. In this paper we examine observations of the ionospheric profiles on Mars obtained on 9–27 March 1999 by the radio science experiment onboard the Mars Global Surveyor satellite, ...

Crater Fields on Venus , Earth and Mars

Introduction: Meteoroids that are disrupted and dispersed in the atmosphere may give rise to crater fields at the surface. For lower mass objects fragmentation may produce a strewn field of meteorite fragments, and then (with increasing mass) meteorites plus impact pits; small meterto tens m-sized well separated craters; craters whose rims overlap; and finally single craters produced by a swarm...

A Revision of Mars Seismicity from Surface Faulting:

The carbon cycle on early Earth--and on Mars?

One of the goals of the present Martian exploration is to search for evidence of extinct (or even extant) life. This could be redefined as a search for carbon. The carbon cycle (or, more properly, cycles) on Earth is a complex interaction among three reservoirs: the atmosphere; the hydrosphere; and the lithosphere. Superimposed on this is the biosphere, and its presence influences the fixing an...