We have come a long way since 1869 when Leland Standford joined the trans continental RR with the gold spike. These machines are amazing. There are a lot of smart people out there!!
These machines seem like something from another world! Seems miraculous that man can create such machines as these, and yet, mankind has explored the heavens!
It's funny how we've been making railroads the exact same way they were made when they were invented.- gravel on the bottom and railroad sitting on ties