I remember reading about a story on Wikipedia while looking at various old science-fiction stories when I came across one about an exploration team finding a sort of oasis in Antarctica in which they encountered giant bugs, if I remember correctly giant tardigrade in particular. It's been on my mind recently and i haven't been able to find it for the life of me. I appreciate any help.
It sounds similar to "The Beetle Horde" by Victor Rousseau. It is in Astounding Stories #1 from January 1930. (It concluded in the February 1930 Issue.) So it's a longish short story. It is available on Project Gutenberg Link to the first part on Project Gutenberg.
Reasons why it sounds similar. A team was exploring the south pole when they discovered a localized warm region. Exploring that they found a bunch of giant beetles. (I don't recall a tardigrade). The story goes on with a "mad" scientist intending to release the horde of giant beetles into the outside world.
Is it possible you have misremembered the article and it is about a film not a short story? I ask because Wikipedia has an article on the film The Land Unknown that matches your description in some respects.
The Wikipedia article doesn't mention giant insects or tardigrades, but does mention a tarsier.