Zombie

A zombie is an aggressive mob with green skin and clothes that closely resembles the player. A zombie measures 2 blocks tall, 1 block wide, and 0.25 blocks thick. Zombies spawn in dimly lit areas and attack players by shambling towards them and touching them. A zombie, like a skeleton, will catch fire in daylight and burn to death.

Combat
Zombies are one of the easiest enemies to deal with and don't pose much of a threat unless encountered in a narrow space or in large groups. A player on sufficiently high ground can repeatedly hit a zombie again and again as it approaches. If the player is being pursued by several zombies, they can use a sword to push them back with each hit, alternating targets so no one zombie can close in.

History
Zombies were the first and fastest mob in Survival Test in the game until spiders were added, and could run as fast as the player. They would occasionally appear wearing armor, but this had no protective effect on their health. When killed, zombies gave 80 points each to the player.

The zombies' armor was removed in Indev. As of Alpha, zombies drop 0 - 2 feathers upon death. Before chickens existed in Minecraft, Notch confessed that he made zombies drop feathers because he had no idea what they should have dropped when killed.

Trivia

 * Because a zombie has identical dimensions to the player model, the zombie's skin can easily be used as a player skin and vice versa.
 * A Giant is an unused variation of a zombie that can only be spawned through third party programs. Its behaviour is identical to the zombie's, but it has 100 hearts of health, deals 8.5 damage in one single hit, and is unable to damage you until you are right under it.
 * The Zombie is a retextured version of the Default player skin.