Im writing a story about a less evolved world where a giant ant colony takes in a stranded stranger. In a world where ants are the size of a small tarantula, how many ants would it take to lift/transport a full grown (human) adult? Also, how big would a single ant have to be to lift a (human) adult above its head?
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closed as off-topic by Mołot, Hohmannfan, Azuaron, L.Dutch♦, James♦ Mar 27 '17 at 19:15
This question appears to be off-topic. The users who voted to close gave these specific reasons:
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- "This question does not appear to be about worldbuilding, within the scope defined in the help center." – Hohmannfan, Azuaron
Ants can lift anywhere between 50 to 5,000 times their own body weight, but also ants are on a different scale, so if we take a conservative 5 times their own weight, given that a dog sized ant would be crushed under the weight of its own exoskeleton.
From there we need the average weight of a human, which google tells me for a man is 83.6kg, and for a woman is 70.2kg (convert this if you want, but they are the units I know and understand)
Now we need the weight of a tarantula, which is 28 - 83 grams, a huge range admittedly, but on the assumption that you're using an average "adult" tarantula, lets assume they weight 70g. which means you're looking at a minimum of 201 of these just to carry your woman, or 239 for a man.
However we need to consider whether that is possible, a tarantula is typically 12cm long, assuming its that wide, then every tarantula takes up 144cm^2, now an average human male is 178cm, and 43 cm wide (shoulder width), so if you're lying down you can potentially have 53 tarantulae carrying you, as no more could fit, but given my estimate of 5 times body mass, these tarantulae would have to take about 20 times their body weight, assuming your human is average, which means they would get crushed to death and probably kill the human.
Luckily for your stranded human, there is the art of handwavium, so you can ignore the specifics of the science, and take your number of tarantula to be about 50 - 200 depending on whether you want to match surface area or the amount of weight lifted