– Most teens don't find music history in their dad's stuff, but Maggie Poukkula's dad is Seattle musician Tony Poukkula, who was a friend of Kurt Cobain. Her find? Photos of Nirvana's first concert, performed by then 20-year-old Cobain and his new band in March 1987 in Tony Poukkula's basement. "My dad showed me them awhile back, but he never mentioned that's what was going on in the photos," Maggie Poukkula, 19, tells Rolling Stone. "I found out because of all the articles. I didn't realize it was such a historical thing. I thought they were just cool pictures of my dad and Kurt jamming together." She tweeted the photos last week, and the post quickly went viral. That first concert featured the early Nirvana lineup of Cobain, bassist Krist Novoselic, and drummer Aaron Burckhard playing original songs and Led Zeppelin covers. Similar early-days footage of Cobain and Co. featured in the recent documentary Montage of Heck has renewed interest in the grunge band. The Emmy-nominated project includes home movies, never-before-heard music, and intimate interviews with Cobain's family and friends, notes SPIN. After being critically acclaimed at festivals across the country, the film will return to theaters on Aug. 7, adds Rolling Stone. (Want a little more Cobain history? Here's the mix tape he made at 21.)