SETI public: Scientists Disagree Over How and When Life Began on Earth

From: LARRY KLAES (ljk4@msn.com)
Date: Tue Oct 15 2002 - 06:55:54 PDT

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Today in Science/Astronomy:

* Scientists Disagree over How, When Life Began on Earth

http://www.space.com/scienceastronomy/generalscience/oldest_life_021014.html

Does the first evidence of life date to 3.85 billion years ago (Ga), or 3.65 Ga? A 200-million-year discrepancy may seem trivial almost 4 billion years after the fact. And yet scientists continue to debate whether some of the oldest rocks ever found date to 3.85 Ga, or "just" 3.65 Ga.

* Black Hole Hunter: High-Energy Integral Telescope Set to Launch

http://www.space.com/scienceastronomy/integral_telescope_021014.html

Gamma ray news has been a little slow since the Compton Observatory was de-orbited and burned up in Earth's atmosphere in June 2000. But on Oct. 17, the European Space Agency will launch the most sensitive gamma ray observatory ever built, one designed to help astronomers understand more about some of the most extreme and violent events in the universe, from supernovae to black holes.

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