As co-founders of blink-182, Mark Hoppus and Tom DeLonge produced some of the most joyous and gleefully immature pop-punk of the ‘90s. But behind the rapid-fire riffs and plentiful dick jokes, creative tensions between the pair escalated. DeLonge’s desire to pursue a wide variety of musical and professional avenues led to lengthy hiatus in the mid ‘00s. A high profile reunion was going fine for a time, until DeLonge was again sidelined by other interests. Blink carried on without him as DeLonge performed intermittently with his new band, Angels & Airwaves, but the man who one sang “Aliens Exist” has devoted most of his energy to the study of UFOs.