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Random question: were the insects really big back in the dinosaur times?

 
Anonymous Coward
User ID: 41234885
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06/11/2013 08:16 PM
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Random question: were the insects really big back in the dinosaur times?
I remember my middle school home school teacher telling me that the dragonflies were 6-7 feet long and the cockroaches 3-4 feet long back in the time of the dinosaurs. Just wondering if anyone else has heard of this because I've never heard of this except from anyone but her and can't find anything on the Internet about it.
Anonymous Coward
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06/11/2013 08:21 PM
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Re: Random question: were the insects really big back in the dinosaur times?
[link to www.google.com]
Vision Thing

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06/11/2013 08:21 PM

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Re: Random question: were the insects really big back in the dinosaur times?
Yes dragonflies ruled the world and I've always thought that was really cool and wished I could see a giant dragonfly like that.

I always knew that from when I was a kid, there must be some articles or books about it.

I think it predated the dinosaurs though?
Anonymous Coward
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06/11/2013 08:23 PM
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Re: Random question: were the insects really big back in the dinosaur times?
The world was smaller and was far more oxygen enriched. At this rate, we will all be three feet tall in a couple thousand years.
Anonymous Coward (OP)
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06/11/2013 08:24 PM
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Re: Random question: were the insects really big back in the dinosaur times?
Yes dragonflies ruled the world and I've always thought that was really cool and wished I could see a giant dragonfly like that.

I always knew that from when I was a kid, there must be some articles or books about it.

I think it predated the dinosaurs though?
 Quoting: Vision Thing


Or maybe it predates the dinosaurs, think she either said they existed during or close to the dinosaur times. The thought of a 7 foot long dragonfly makes me want to vomit though.
Anonymous Coward
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Canada
06/11/2013 08:37 PM
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Re: Random question: were the insects really big back in the dinosaur times?
I remember my middle school home school teacher telling me that the dragonflies were 6-7 feet long and the cockroaches 3-4 feet long back in the time of the dinosaurs. Just wondering if anyone else has heard of this because I've never heard of this except from anyone but her and can't find anything on the Internet about it.
 Quoting: Anonymous Coward 41234885


Yes, everything was larger.

The reason why it was like that was the spectrum of the sun was different (because it was a younger star). It was outputting more UV rays, especially in the UVB spectrum.

For mammals/reptiles/birds/organisms with skeletal structures more UVB rays meant the organisms made more vitamin D, more vitamin D meant more calcium utilization, more calcium utilization meant larger bones, larger bones meant larger organisms.

The UV rays also had huge impacts on the other organisms by feeding certain biochemical processes that lead to larger bodies and structures.

Then as the sun began to age, the spectrum changed, leading less and less to UV rays, thus leading to a change in the shape of organisms.

Eventually the sun will stop producing enough UV rays to sustain life on the planet, then eventually all organisms except plants will be gone, then when the spectrum reaches the infrared side of the spectrum, the planet will be barren of most life, and only some bacteria will be left. Similar to what Mars is like now.
Anonymous Coward
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06/11/2013 08:47 PM
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Re: Random question: were the insects really big back in the dinosaur times?
The world was smaller and was far more oxygen enriched. At this rate, we will all be three feet tall in a couple thousand years.
 Quoting: Anonymous Coward 19490298


A smaller planet explains such things as the size of the dinosaurs and treeferns, but for the insects being larger, you need to have either higher atmospheric pressure and/or greater % of oxygen.

Some of those Pterodactyls were huge! - and it is a measure of just what groupthinking sheep academics are, that they blithely just accept that these creatures actually were able to fly around in pretty much the same conditions we have today.
Anonymous Coward
User ID: 41551121
United Kingdom
06/11/2013 08:51 PM
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Re: Random question: were the insects really big back in the dinosaur times?
I remember my middle school home school teacher telling me that the dragonflies were 6-7 feet long and the cockroaches 3-4 feet long back in the time of the dinosaurs. Just wondering if anyone else has heard of this because I've never heard of this except from anyone but her and can't find anything on the Internet about it.
 Quoting: Anonymous Coward 41234885


Yes, everything was larger.

The reason why it was like that was the spectrum of the sun was different (because it was a younger star). It was outputting more UV rays, especially in the UVB spectrum.

For mammals/reptiles/birds/organisms with skeletal structures more UVB rays meant the organisms made more vitamin D, more vitamin D meant more calcium utilization, more calcium utilization meant larger bones, larger bones meant larger organisms.

The UV rays also had huge impacts on the other organisms by feeding certain biochemical processes that lead to larger bodies and structures.

Then as the sun began to age, the spectrum changed, leading less and less to UV rays, thus leading to a change in the shape of organisms.

Eventually the sun will stop producing enough UV rays to sustain life on the planet, then eventually all organisms except plants will be gone, then when the spectrum reaches the infrared side of the spectrum, the planet will be barren of most life, and only some bacteria will be left. Similar to what Mars is like now.
 Quoting: Anonymous Coward 3937774


Hmmmm - that's a new one - you have some sort of experimental evidence for this right!?

Like animals growing huge on Vit D supplements?
Prostetnik

User ID: 11386563
Canada
06/11/2013 08:56 PM
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Re: Random question: were the insects really big back in the dinosaur times?
yes, for instance the Meganeura (ancient dragonfly) was over 2 feet in wingspan.
Anonymous Coward
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06/11/2013 08:58 PM
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Re: Random question: were the insects really big back in the dinosaur times?
Dinosaurs came from fish

fish

And so did dragonflys

pilot

_
n0b0dy
User ID: 41554297
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06/11/2013 09:03 PM
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Re: Random question: were the insects really big back in the dinosaur times?
what people fail to realize is the dinosaurs didnt live in our current gravity.

the biggest dinosaurs would have been crushed under its own weight if it fell with TODAYS gravity.

Earth is nothing more that an piece of the planet that was between mars and Jupiter.

dinosaurs never roamed the third planet from the sun, the roamed a long time ago in the planet that is now what you humans call the asteroid belt.
Montblanc

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Portugal
06/11/2013 09:04 PM

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Re: Random question: were the insects really big back in the dinosaur times?
The world was smaller and was far more oxygen enriched. At this rate, we will all be three feet tall in a couple thousand years.
 Quoting: Anonymous Coward 19490298


A smaller planet explains such things as the size of the dinosaurs and treeferns, but for the insects being larger, you need to have either higher atmospheric pressure and/or greater % of oxygen.

Some of those Pterodactyls were huge! - and it is a measure of just what groupthinking sheep academics are, that they blithely just accept that these creatures actually were able to fly around in pretty much the same conditions we have today.
 Quoting: Anonymous Coward 41551121


And as far as we know, the Earth was more homogeneous back then, continents were not so distant from each other and the land was filled with trees and plants which must have produced enormous amounts of oxygen.
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