Zero prints as "0" not "0.000e+00" so zero is distinguishable.

gracedb/templatetags/scientific.py

@@ -20,6 +20,8 @@ special_floats = [str(pos_inf), str(neg_inf), str(nan)]
 def scientific(text):
     if text is None:
         return mark_safe("")
+    if text == 0:
+        return "0"
     try:
         out = "%0.3e" % text
     except: