Dinosaur Jr. is an American alternative rock band formed in 1984 in Amherst, Massachusetts. Known for their distinctive blend of loud, layered guitar sounds and introspective lyrics, the band's lineup initially featured J Mascis, Lou Barlow, and Murph. They gained prominence in the late 1980s and early 1990s, influencing the grunge and indie rock scenes with albums like "You're Living All Over Me" and "Bug." After a hiatus, the original lineup reunited in the 2000s, releasing new material and continuing to perform, solidifying their status as enduring figures in the alternative rock genre. Their music is characterized by J Mascis's signature guitar work and distinct vocal style, earning them a dedicated fanbase and critical acclaim over the years.