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Dwarfism in dinos



Art Berggreen wrote

> Since this is in my backyard, I thought I'd throw in my $0.02.  A friend of
> mine (Dr. Bob Gray) has excavated pygmy mammoth material on the Santa Barbara
> Channel Islands, and occasionally lectures about them.  Most of the remains
> have been found in dune deposits on Santa Rosa Island (I don't recall any from
> Catalina, but it certainly may be true).   Material was first collected in
> the '50s the Dr. Phil Orr, much of which has never been prepared.  Studies
> of the sea level during the pleistocene indicate that the width of the channel
> was less than at present, but never less than about 12 miles.  Dr. Holtz is
> correct about modern elephants.  Confirmed reports have shown modern elephants
> swimming distances of up to 60 miles.  Their trunks apparently make very good

Are any examples of pygmy dinosaurs known? 

Re elephants (a large rathole in this topic, but worth the detour),
elephants are supposed to be able to detect others by very low
frequency sounds from a great distance (up to 200 km), so providing a
motive to swim from island to island could be simply the presence of
other elephants. Add in females on heat and I should think any male
would take a swim.

Are dinosaurs suspected to have been able to detect VLF sounds? Are
there any s ear modifications/specialisations which could support this
idea?

ciao, martin