In the aftermath of the Sin of the Spies, God says that because Calev had a different spirit and followed God, he will enter the Land of Israel.

Why isn’t Yehoshua mentioned? What does a "different spirit" mean? Did Calev have a more difficult time than Yehoshua in following the path of God? Was his "different spirit"  different from the other spies, or different from Yehoshua?

We also look at the matter of the  punishment for the Sin of the Spies: why should it be one year for each day? Shouldn't the punishment fit the crime? Or was there sin in the trip itself?