Vedas are eternal divine knowledge which is given to the noble souls at the inception of every human civilization. Thus, creation, preservation, and destruction of the universe happens in continuous cycles. Vedas are the only scriptures which are sacred and are UNCORRUPTED since inception. They are the oldest source of knowledge to mankind.
There are four different kinds of Vedas. Rig Veda, Sama Veda, Yajur Veda, and Atharva Veda.