District of Columbia v. Helle
The Northwest Passage is a sea route<span> connecting the northern Atlantic and Pacific Oceans ... Explorers </span>thought<span> that an open </span>water route<span> close to the North Pole must exist. ... While searching for </span>him<span> the McClure Arctic Expedition discovered the ... the Northern Sea </span>Route<span>), making it possible to </span>sail around<span>the Arctic ice cap.</span>
We can say that these theories are human constructions.
These theories were constructed, or created by humans, which makes them human constructions. They didn't exist before humans made them - they weren't previously part of nature around us. Rather we created them to suit our own needs and to make us understand life in general.
Meteorologist..................................................................