Fw: exosci.com / dec 4, 2000
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From: exoScience <davew@...>
To: List Member <ufonet@...>
Sent: Monday, December 04, 2000 3:21 PM
Subject: exosci.com / dec 4, 2000
> exoScience - http://www.exosci.com/
> * Mars was once a land of lakes
> Layered geologic outcrops on Mars, described in today's issue of the
> journal Science--may be composed of sedimentary rock that dates from the
> earliest span of martian history, between 4.3. and 3.5 billion years ago.
> Images of these sedimentary rock exposures, captured by the Mars Orbiter
> Camera (MOC), suggest that parts of ancient Mars may have resembled a land
> of lakes, and that the geology of early Mars was much more dynamic than
> previously suspected.
> * The pounding of a lifetime
> Lunar meteorite ages present new, strong evidence for the "lunar
> cataclysm," a 20-to-200 million-year episode of intense bombardment of the
> moon and the Earth at 3.9 billion years ago -- when the first evidence of
> life appeared on Earth, planetary scientists report in the Dec. 1 issue of
> Science. Whether or not there was life on Earth at the beginning of the
> bombardment, such cataclysmic pounding would have enormous consequences
> for life on this planet, whether by destroying existing life or organic
> fragments or by delivering molecules and creating conditions suitable for
> life, the researchers add.
> * Bacteria make mine waste drinkable
> Tiny bacteria that usher dissolved zinc into a solid form may help make
> the removal of mining waste more efficient in groundwater and wetlands,
> according to a study in the 1 December issue of Science.
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