Sangeet: Are wearing Janeu (sacred thread), Tilak, and Ear piercings mentioned in the Vedas?
Swami Ram Swarup: Sangeet beta wearing janeyu and ear piercing is mentioned in Vedas. My blessings to you.

Mahesh: Can I chant Vedic mantras without guru diksha?
Swami Ram Swarup: Mahesh beta, there is no rule for learning or chanting Vedic mantras without a learned Vedic Guru.