Grant Imahara, longtime co-host of the beloved Discovery Channel science series MythBusters, has died, he was 49.

“We are heartbroken to hear this sad news about Grant,” a rep for Discovery Channel told stated on Monday night. “He was an important part of our Discovery family and a really wonderful man. Our thoughts and prayers go out to his family.”

Imahara reportedly died suddenly following a brain aneurysm.

Following MythBusters, he served as a co-host of Netflix’s White Rabbit Project, alongside his former MythBuster co-host Kari Byron and Tory Belleci.