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Why aren't there giant insects ?



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

   

Recent comments on this video
Comment icon #1 Posted by Realm on 7 September, 2013, 7:05
Because they stopped eating super-sized meals?
Comment icon #2 Posted by brlesq1 on 7 September, 2013, 7:10
I can't handle the insects we have. If there were giant insects, I'd die. I'd just shrivel up and die.
Comment icon #3 Posted by Realm on 7 September, 2013, 7:24
I can't handle the insects we have. If there were giant insects, I'd die. I'd just shrivel up and die. lol
Comment icon #4 Posted by Still Waters on 7 September, 2013, 13:51
Giant spiders? *runs* .
Comment icon #5 Posted by danielost on 7 September, 2013, 18:40
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.
Comment icon #6 Posted by Still Waters on 7 September, 2013, 21:53
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. Also, the largest spider is the horseshoe crab. Horseshoe crabs are marine arthropods.
Comment icon #7 Posted by Aggie on 7 September, 2013, 22:10
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. I like little critters. One of the r... [More]
Comment icon #8 Posted by Frank Merton on 7 September, 2013, 22:18
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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