diff --git i/Lib/glob.py w/Lib/glob.py
index 0aee605..3a37fd3 100644
--- i/Lib/glob.py
+++ w/Lib/glob.py
@@ -18,7 +18,10 @@ __all__ = ["glob", "iglob"]
 def glob(pathname):
     """Return a list of paths matching a pathname pattern.
 
-    The pattern may contain simple shell-style wildcards a la fnmatch.
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, the filenames starting with
+    period are special cases that are not matched by '*' and '?'
+    patterns.
 
     """
     return list(iglob(pathname))
@@ -26,7 +29,10 @@ def glob(pathname):
 def iglob(pathname):
     """Return an iterator which yields the paths matching a pathname pattern.
 
-    The pattern may contain simple shell-style wildcards a la fnmatch.
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, the filenames starting with
+    period are special cases that are not matched by '*' and '?'
+    patterns.
 
     """
     if not has_magic(pathname):