On Mars, a Second Chance for Life

  title={On Mars, a Second Chance for Life},
  author={Richard A. Kerr},
  pages={2010 - 2012}
  • R. Kerr
  • Published 17 December 2004
  • Physics
  • Science
The Mars rovers, with the help of remote-sensing spacecraft, have sniffed out water and found the remains of one or more ancient environments where life could have survived. Indeed, early Mars is looking wetter and wetter. For an expanded version of this section, with references and links not found in the print edition, see www.sciencemag.org/sciext/btoy2004. 

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A simple alternative explanation involving deposition from a ground-hugging turbulent flow of rock fragments, salts, sulphides, brines and ice produced by meteorite impact is presented, which can account for all of the features observed without invoking shallow seas, lakes or near-surface aquifers.

The Search for Sustainable Subsurface Habitats on Mars

On Earth, the deep subsurface biosphere of both the oceanic and the continental crust is well known for surviving harsh conditions and environments characterized by high temperatures, high pressures,

Mars Primordial Crust: Unique Sites for Investigating Proto-biologic Properties

Early Mars appears to have been remarkably similar to early Earth, and samples of rock from the first few Ma or first 100 Ma may reveal “missing link” proto-biological forms that could shed light on the transition from abiotic organic chemistry to living cells.

Geographers of Mars

This essay offers a new explanation for the power with which the notion of an inhabited Mars gripped noted scholars and everyday citizens on both sides of the Atlantic and suggests that turn‐of‐the‐century representations of Mars could be productively recontextualized alongside geographical works produced in the same period.


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The best in class of mining information streams is given and the approach in handling the issue is displayed and the paper likewise features the tended to and open issues in the field.

net Features “ Geography of Opportunity ” : Poverty , Place , and Educational Outcomes

Research Association's Presidential Address. The purpose of the article is to describe the geography of opportunity in two metropolitan regions of the United States that are engaged in significant

“Geography of Opportunity”: Poverty, Place, and Educational Outcomes

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Electromagnetic Propagation of GPR Signals in Martian Subsurface Scenarios Including Material Losses and Scattering

The GPR performance in terms of resolution and maximum penetration depth is evaluated in the considered scenarios for different operating frequencies, thus providing a basic information for the design of systems for future subsurface sounding investigations on Mars.