The Year 2037 is the second encountered timeline inspired from the Movie "The Time Machine" where the moon crashed to the Earth that year but in this case it's the Nether as it merged into our world. Professor Herobrine predicted this merge would occur years prior being the reason why he attempted to escape through time by making the Time Machine. The area is all red filled with lava from the Nether crash as long with all the dirt getting destroyed. All regular evolved mobs got destroyed or obliterating from existence and became extinct as well. All that remains left are Evolved Pigman with bows holding special rubies.
Evolved Bow-Pigman appear a bit more rarely then regular evolved pigman. They are a bit tougher and smarter then the original evolved pigman as they move quicker and run into the player and shoot the player with an Evolved Skeletron Bow. They have 40 health and are easily marked with Pink Ruby Chestplate. The bow can not normally be crafted until the Year 1500CE but here yo have a chance to get one. Lastly he drops Pink Rubies used to craft the activator for the next timeline as well as to craft a new armor set.
After getting Pink Rubies from the Evolved Bow-Pigman you can craft as follows along with the Pink Ruby Set which is very strong and defensive.
The Year 205,582 Activator can be crafted to go to the third timeline which isn't a required timeline to visit.