This Fortnite challenge is a two-step mission that will require you to go to specific places on the island.
First you need to find an alien sample. These are usually found in IO databases. Once you have one, take it to Corny Complex.
Where to find the alien sample
To find an alien sample, you must go to an IO base. Since the second step requires going to Corny Complex, you might as well go to the base located nearby.
The samples are in boxes placed on the ground, at the base of the dishes. They're pretty easily spotted.
Once the sample has been collected, all you have to do is get to Corny Complex as quickly as possible.
Near the entrance to the cave you'll see a crate waiting for a deposit -- simply interact with it to complete the challenge.
Naturally, be mindful of other players attempting to complete the same challenge. Make sure you're armed up properly beforehand!
Alien artifacts allow you to obtain additional styles for the Kymera skin, which is unlocked as soon as you purchase the Battle Pass. Here's where you can find the alien artifacts in Season 7 Week 9.