diff --git a/binarycpython/utils/grid.py b/binarycpython/utils/grid.py
index 4e878feb7368816bf5277ff69ead85e0d0ab3787..4fbfa7cffad068340df588663434e0f54218093d 100644
--- a/binarycpython/utils/grid.py
+++ b/binarycpython/utils/grid.py
@@ -812,7 +812,7 @@ class Population(object):
         # TODO: calculate the chunksize value based on: total starcount and cores used. 
         r = list(p.imap_unordered(evolve_system, yield_system(), chunksize=20))
 
-        # Handle clean termination of the whole multiprocessing
+        # Handle clean termination of the whole multiprocessing (making sure there are no zombie processes (https://en.wikipedia.org/wiki/Zombie_process))
         p.close()
         p.join()