J. Mascis is a talented musician who is best known as the guitarist, singer, and songwriter for the alternative rock band Dinosaur Jr. He was born on December 10, 1965 in Amherst, MA, making him a Sagittarius.

Mascis has always been a gifted musician. He started playing guitar when he was just 12 years old and by the time he was in high school, he was already in a band. In 1984, he co-founded Dinosaur Jr. with Lou Barlow and Murph. The band quickly gained popularity and released several successful albums throughout the 1980s and 1990s.

Although he is most famous for his work with Dinosaur Jr., Mascis has also released several solo albums and collaborated with other artists over the years. He is a true musical genius and his work has had a major impact on the alternative rock genre.