View Full Version : Few Planets Will Have Time to Form Complex Life

2005-Sep-07, 04:10 PM
SUMMARY: Does life exist elsewhere in the Universe? This question continues to puzzle scientists, but now Professor David Catling at Bristol University thinks that significant oxygen in the atmosphere and oceans of a distant planet are required for complex organisms to evolve. The fact that it took almost 4 billion years here on Earth means that other planets might not have a lot of time to evolve complex life. Since our Sun still has another 4 billion years before it dies, life has time to flourish, but planets around other, more short-lived stars might not be so lucky.

View full article (http://www.universetoday.com/am/publish/few_planets_time_life.html)
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