Jacob lays Mother & MIB's bodies to rest at the caves, they are Adam & Eve

Jacob makes his way through the jungle to a stream and washes up. He looks up and sees the lifeless body of his brother on some rocks. Jacob weeps over the body, then picks it up and carries it to the cave.

Jacob lays MIB's body where they slept as children. He then goes to Mother's body and picks up the black and white stones and places them in a pouch. We cut away and see Jack and Kate discovering the pouch of rocks in season 1 with the "Adam and Eve" skeletons.

Jacob then closes Mother's eyes, picks her up and lays her next to MIB's body. We again cutaway to season 1 and Kate asks who the Adam and Eve skeletons are and where did they come from. Jacob then joins Mother and MIB's hands, kisses the pouch containing the stones and places it in MIB's other hand. We cut away again and see Locke calling the skeletons "Our very own Adam and Eve."

We then see Jacob looking over the bodies, still crying, and he says "Goodbye brother."

This was one of the biggest reveals of the series. While the clips from the season 1 episode "House of the Rising Sun" hit us over the head a bit with the significance of the Adam and Eve reveal, it did show us how far the story and these characters have come since Oceanic 815 crashed on the island.

With MIB's body being discovered by the creek indicates he is no longer human, but he still has the same goal of leaving the island. What would happen if this creature gets off the island?

Jack & Hurley find Shannon's inhaler, visit the caves, Adam & Eve skeletons & Christian's coffin

As Jack and Hurley make their way through the jungle, Jack steps on something that was pivotal to the season one plot. It's none other than Shannon's missing inhaler.  Jack looks up and realizes that they are at the caves which were last seen in the season two episode "Adrift."

They go in the caves and Hurley examines the "Adam and Eve" skeletons, which had only been seen once before in the season one episode "House of the Rising Sun" when Jack discovers them. Hurley comes up with a theory that the survivors time travel to "dinosaur times" as he calls it, died and were then laid to rest in the caves.

Meanwhile, Jack is staring at Christian Shephard's coffin which he destroyed in the season one episode "White Rabbit" after he discovers Christian's body is not inside. He tells Hurley the truth about how he found the caves, since everyone originally thought he stumbled upon them while looking for water.

Hopefully this scene is going to lead to an answer to both of these big questions in coming episodes. Exactly who are the skeletons, how did they get there and when? And then, what exactly happened to Christian's body and is it somehow tied to the body's disappearance in the new timeline?