ZetaTalk: Density

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ZetaTalk: Space Dust, Alive?

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ZetaTalk: Space Dust, Alive?

written Jan 6, 2006

Life, of course, is everywhere, as we have explained, emerging on diverse worlds,

carbon or silicon based or emerging on worlds humans would consider too poisonous

for life. Gaseous planets support life, on occasion, nor is DNA, per se, required.

Crystals develop, start and grow, but are not considered life. Why? Because mobility is

utterly lacking, and thus any ability for conscious thought as independence from the

environment is not possible. A tree lacks mobility but is alive, because it reacts to

attacks against itself by healing its wounds and seeks to perpetuate itself by leaning into

the sunlight. Life defends itself, perpetuates itself, and seeks to grow by accumulation.

With mobility comes intelligence, scarcely needed otherwise. With intelligence can

come consciousness, the awareness of the self as distinct from other life. We have