How many olmec colossal heads have been discovered?

I believe that is 17.

Hope it helps!

renascimento comercial, que, a partir do século 11, inaugurou definitivamente a baixa idade média, que se estenderia até o século 15.

grunge  bands  such as nirvana, pearl jam, soundgarden, and alice in chains broke into the mainstream, achieving commercial chart success and widespread exposure. punk revival  bands  like green day and the offspring also became popular and were grouped under the "alternative" umbrella.