SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Politics : Evolution
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Brumar89 who wrote (1252)2/27/2006 1:37:12 PM
From: TigerPaw  Read Replies (1) of 69300
 
Roughly 550 million years ago the first complex animals, such as trilobites, appear in the fossil record. Many scientists have concluded that an increase in the amount of atmospheric oxygen was critical to the relatively sudden evolution of these animals.

You may be confusing the appearence of complex multicellular eukaryotic creatures with the appearence of life. The Cambrian period was preceeded by three billion years of more primitive creatures. Because of more efficient sex, evolution has been proceeding faster since that time.

TP
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News