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Why aren't there giant insects ?


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#1    Saru

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Posted 06 September 2013 - 12:48 PM

Why aren\'t there giant insects ?
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Click here to watch video - 03:50s

Hank and physiologist Jon Harrison discuss the question of insect size - why is there a limit ?




#2    Realm

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Posted 07 September 2013 - 07:05 AM

Because they stopped eating super-sized meals?


#3    brlesq1

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Posted 07 September 2013 - 07:10 AM

I can't handle the insects we have. If there were giant insects, I'd die. I'd just shrivel up and die.

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#4    Realm

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Posted 07 September 2013 - 07:24 AM

View Postbrlesq1, on 07 September 2013 - 07:10 AM, said:

I can't handle the insects we have. If there were giant insects, I'd die. I'd just shrivel up and die.

lol

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#5    Still Waters

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Posted 07 September 2013 - 01:51 PM

:o Giant spiders? *runs* >>>>>>>.>>>>

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#6    danielost

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Posted 07 September 2013 - 06:40 PM

There are two reasons there aren't giant insects. 1 not enough O2.  2 their body armour/exoskeleton. When dinos roamed there was more oxygen in the air and there were giant insects. Oh and spiders aren't insects. Also, the largest spider is the horseshoe crab.  Which has been around longer than the dinos.

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#7    Still Waters

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Posted 07 September 2013 - 09:53 PM

View Postdanielost, on 07 September 2013 - 06:40 PM, said:

Oh and spiders aren't insects.
I know that, they're arthropods, but when I see one in my house it becomes a creepy-crawly insect as far as I'm concerned.

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Also, the largest spider is the horseshoe crab.
Horseshoe crabs are marine arthropods.

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#8    Aggie

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Posted 07 September 2013 - 10:10 PM

View Postdanielost, on 07 September 2013 - 06:40 PM, said:

There are two reasons there aren't giant insects. 1 not enough O2.  2 their body armour/exoskeleton. When dinos roamed there was more oxygen in the air and there were giant insects. Oh and spiders aren't insects. Also, the largest spider is the horseshoe crab.  Which has been around longer than the dinos.

Exactly this and also because they have no bones in their bodies and they depend on coats of crisp shell or leathery skin to hold them in shape. Their outer skeletons are tough, but not tough enough to hold a lot of large, soft organs in their proper places.

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#9    Frank Merton

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Posted 07 September 2013 - 10:18 PM

View Postdanielost, on 07 September 2013 - 06:40 PM, said:

There are two reasons there aren't giant insects. 1 not enough O2.  2 their body armour/exoskeleton. When dinos roamed there was more oxygen in the air and there were giant insects. Oh and spiders aren't insects. Also, the largest spider is the horseshoe crab.  Which has been around longer than the dinos.
Except if I remember correctly the age of giant insects (compared to modern ones) preceded the dinosaurs.





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