Bone

Bones are items dropped by Skeletons when they are killed. Bones were added in the Minecraft Beta 1.2 update. Skeletons drop 0-2 bones on death.

Uses
Bones can also be used to make Bone Meal, which serves two purposes: it can be used as a fertilizer for farming that immediately makes plants grow to their mature state, or it can act as a dye that makes wool white and can be combined with other dyes. Bone Meal does not work 100% of the time when used as a fertilizer.

As of Beta 1.4, bones are used to tame wild wolves. More than one bone will need to be used on the wolf in most cases. Bone Meal cannot be used to tame wolves.

Crafting
Bone creates 3 bone meals when put in the crafting table.

Trivia

 * Since Beta 1.4, Bones can be found in dungeons.

Glitches

 * When you feed a wolf with 1 bone, and if it is tamed, you may get 0 bones left, which is infinite.