Maximum Snark: "I think he is signing AAHHHH!" -Tom ServoThat is why/obscure to all but the most cultures farkers
Cerebral Knievel: ZAZ: In my day dissecting frogs was the pinnacle of high school biology. A generation later students could make glowing frogs. In 2030 school children will be designing and growing eight foot tall giant ants for the stage version of Them. (Yes, feet, the U.S. will stand alone as metric deniers.)in my day... the frog was the lead up to the pig fetus... which some of us jackasses in class used the small intestine as a jump rope... I wanna say this was about... 1991-2?
Animatronik: An exoskeleton also makes growing in size a lot less convenient.We don't have to periodically shed our bones to grow new ones. It tends to give smaller critters an advantage because they get more support from less exoskeleton.
Fano: ZAZ: In my day dissecting frogs was the pinnacle of high school biology. A generation later students could make glowing frogs. In 2030 school children will be designing and growing eight foot tall giant ants for the stage version of Them. (Yes, feet, the U.S. will stand alone as metric deniers.)On it
IlGreven: thatboyoverthere: To be specific the cube-square law in relation to their trachea. They get too big and the trachea can not take in enough oxygen to keep up cellular respiration./Thank God.Basically, 1: Their legs would not be strong enough to hold their weight. 2: Those with wings certainly would not be able to fly, and 3: their lungs would not be big enough to service their now giant bodies.
Sgygus: Kent Brockman reference.There you go, Miss Stein. You don't have to leave now.
Wasilla Hillbilly: [1.bp.blogspot.com image 616x328]"I learned it from you!"Also, why is our scientists afraid to ask? Why are not humans insect sized? Imagine the sudden wealth of resources and low, low, low carbon footprint.
falkone32: 3) Replacing tracheae with lungs would be significantly more difficult (i.e. nearly impossible) than just having evolved lungs in the first place. You need to remove something that works and replace it with something that won't work as well for many hundreds of thousands of years (or ever). You might as well ask why humans haven't evolved beyond our basal ganglia.
chatikh: Insects are the most successful animals ever to exist on earth. They do just fine without lungs.
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