Dead Space 3 Walkthrough Part 46 – Everything Has Its Place (Paleontology)
As Issac begins the cross-over he will be attacked by numerous Slashers. This includes Snow Slashers and Dark Slashers. Once Issac enter the first room into Paleontology, loose a Scavenger Bot to look for goods. Just go forward after that and head into the door on the left. This door is powered down right now. Look to the right of it to find the panel and lever you need to Kinesis away at to get this door working again.
Once through the door, loot your way into the room with the desk. On the desk Issac will find a the key to the Reaper's Barracks, opening a side quest, and opposite it, to the right of the hallway he came through a circuit(+2 Reload, +1 Damage). At the far end of the room you will find a Tungsten Torque Bar Room. If you have one, it is a good time to use it. Inside this loot room Issac will find supplies and the Explosive Module Weapon Part just inside to the right. Clear the room then head for the door nearby. This is an elevator leading down to the lower levels of this section.
Once out of the elevator be on guard. There are Necromorphs, Dark Feeders, around here. There is one patrolling the top and a large number of them on the level below. You can either fire on the one up top or engage them all on the lower flower. There are a lot of them but they still go down easily enough.
When the room is cleared head back first to the side with the lift. Go along the right-hand wall to find another Audio Log, “Two Strands”. Grab it then it is time to turn your attention to the cross section of “Rosetta”. Head to the opposite side of the room now. You have a puzzle to deal with.
The cross section is in a machine that needs to be adjusted so all 3 of its sections align at 0 degree. There are controls at each end of the console. The one closer to the end of the scanner, toward the elevator will rotate the closest scanner and the middle 60 degrees. The one toward the end of the scanner will rotate the far scanner and the middle scanner 90 degrees and 60 degrees respectively. Use this to manipulate each of the scanners into a vertical alignment. Once you have, then go to the console panel and tell it to activate the scanner. Head around to the end closest to the elevator to grab the cross section and take it to the right and over to the reciprocal to send it back to the Rosetta Lab. Now head around the scanner and go through the door opposite the cargo lift. Through this door Issac can either head into the Reaper Barracks or continue forward on. This means this is one the better times to engage in the Reaper Side Quest.