While human sacrifice was practiced throughout Mesoamerica, the Aztecs, if their own accounts are to be believed, brought this practice to an unprecedented level. For example, for the reconsecration of the
Great Pyramid of Tenochtitlan in 1487, the Aztecs reported that they sacrificed
80,400 prisoners over the course of
four days, reportedly by
Ahuitzotl, the Great Speaker himself. This number, however,
is not universally accepted.
For the re-consecration of
Great Pyramid of Tenochtitlan in 1487, the Aztecs reported that they sacrificed about 80,400 prisoners over the course of four days, though there were probably far fewer sacrifices. According to Ross Hassig, author of
Aztec Warfare, "between 10,000 and 80,400 persons" were sacrificed in the ceremony.
[41] The higher estimate would average
14 sacrifices per minute during the four-day consecration.
http://en.wikipedia.org/wiki/Human_...ture#Estimates_of_the_scope_of_the_sacrifices
Basically, they did in fact practice human sacrifice, but the numbers are all over the place. Either way, reading about some of the ways they'd kill people...