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Re: On the subject of mysterious absences...The Answer



In a message dated 4/19/2008 8:00:38 PM Eastern  Daylight Time, 
danchure@easilink.com writes:

<< Briefly: if you  want to filter feed without gills, you need to take in a 
large amount of water  and then somehow stop it going down your gullet before 
you spit it out past  filtering surfaces such as baleen . Only mammals can do 
this, as only they have  seals that shut off the back of the throat (such as 
you use when you gargle) --  probably evolved in association with suckling."  >>

See:  http://dml.cmnh.org/2008Feb/msg00330.html 

DV  




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