Only a special type of being very close to our own biological design could have taken the first and vital step to technological enlightenment, fire-making.
How is it that an ant appears proportionately so much stronger than a trained human weight lifter?
Only an organism of our dimensions and android design — 1.5 to 2 meters in height with arms about 1 meter-long ending in manipulative tools — can handle fire.
The mechanism represents a unique and stunningly brilliant solution to the problem of raising water to the top of large trees.
Clearly, unless water can be drawn several meters up the conduits in their tree trunks, large woody trees would be impossible.