Here's another bit of consideration:
   Imagine Life itself (including humanity) as a slime mold
   covering the entire planet Earth.

   It was born billions of years ago; who knows when it will die.

   We're a part of this organism. Similar ideas come up at the same
   time by different people? It's because we're a part of the slime
   mold. Unique individuals, yes. Self-aware, yes. But primarily
   part of this gigantic slime mold.

   That's why I don't worry about death. Ideas communicated are
   chemical/electric/photonic - however you like to put it -
   anyway. When a concept is shared, it lives on. Part of
   immortality. It's really pretty awesome.