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Author Topic:   What type of biological life will more than likely be found on other planets?
Dr Jack
Member (Idle past 1375 days)
Posts: 3507
From: Leicester, England
Joined: 07-14-2003


Message 174 of 178 (671229)
08-23-2012 11:35 AM
Reply to: Message 166 by Dogmafood
08-22-2012 9:53 PM


Re: Rare sapience
Which insects or animals don't have brains?

Of the 35 phyla listed by Wikipedia (other sources will give slightly varying numbers), 22 have no brain, 2 have brains in only some species, 2 I wasn't sure about and just nine have brains in all members.

If you take a more generous view of what a brain is and include any cephalisation as a "brain", then about half the 'no brain' phyla switch sides.

So, you see, animals without brains are really not that rare.


This message is a reply to:
 Message 166 by Dogmafood, posted 08-22-2012 9:53 PM Dogmafood has replied

Replies to this message:
 Message 175 by Dogmafood, posted 08-24-2012 8:35 AM Dr Jack has replied

  
Dr Jack
Member (Idle past 1375 days)
Posts: 3507
From: Leicester, England
Joined: 07-14-2003


Message 177 of 178 (671296)
08-24-2012 9:18 AM
Reply to: Message 175 by Dogmafood
08-24-2012 8:35 AM


Re: The quantum of intelligence
Still, would you describe creatures with brains to be uncommon in the world?

Nope. Plus, it's independently evolved multiple times so I'd argue we'd expect to see brains in all animal-like life.


This message is a reply to:
 Message 175 by Dogmafood, posted 08-24-2012 8:35 AM Dogmafood has seen this message

  
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