This can only be done after your first mission (Sanctuary).
After acquiring a artifact, go in the weapons locker (where you
get information on weapons, where Isaak works; across the hall
from the briefing room. Look on the desk behind and to the left
of Isaak. All collected artifacts will appear here.

Hint: Aboard The Atlantis: Wandering Sea
Goat
This can only be done after the Swamp mission (the
mission after Sanctuary). Walk around the ship and look for a
Sea Goat. Find it twice. then Dalton (you, the player) can interact
with it. It will make Dalton say one thing. Then, after another
mission, he changes his comment but you will have to find it twice
again.