posted on May, 22 2008 @ 11:00 AM
What I've heard about insects and spiders is that they cannot get much larger, if any, than they are do to their respiratory system.
Most insects rely on a passive breathing system where air just flows in and out of a hole, not forced in and out the way we breathe and other animals,
or absorb oxygen thru their skin.
This alone restricts their size due to the fact that if they were larger, they couldn't absorb enough oxygen.
Spiders and insects would have to have a respiratory system similiar to ours in order to grow very large.
I heard this a long time ago, I think I've decribed it correctly, please feel free to correct me if I'm wrong.
Also found this
Hollywood's version of arachnids is very imaginative. Because they have an exoskeleton, arachnids have a size limit; there is only so much
skeleton a spider can haul around!
, dirkboy, Just wanted to let you know, there is NO
story about this on your link, you might
want to fix it, or
you will be found out as trying to intentionally lie, or trying to pull a hoax on ATS and will probably be banned. Up to you there
[edit on 5/22/2008 by Keyhole]