According to the Hollywood Reporter, Grant Imahara, one of the hosts of the popular MythBusters series, died of a brain aneurysm when he was 49 years old.

“We are heart broken to hear the sad news about Grant,” said on Monday a representative of Discovery in a statement. “He was a critical member of our Discovery family and a truly wonderful man. Our thoughts and prayers go out to his family. “

After earning a degree in electrical engineering from USC, Imahara worked for the visual effects division of LucasFilm for several years before joining MythBusters in 2005. The scientific reality show featured hosts testing a variety of rumors, urban legends and film scenes to see if they could actually be reproduced Imahara worked on the secondary “Team Build” of the show, providing electrical and robotic skills.

Imahara left MythBusters in 2014 with the other members of “Build Team” Kari Byron and Tory Belleci, but the trio got together to host the Netflix White Rabbit Undertaking series, which released its first and distinctive season in 2016. (MythBusters also terminated its Discovery class in 2016, but was restarted the following year on the Science channel with new hosts.)

Adam Savage, the host of MythBusters in Imahara, commemorated it on Twitter: “I am lost. No words. I have been in two large families with Grant Imahara for the past 22 years. Grant was a really brilliant engineer, artist and performer, but also such a generous, easy-going and gentle PERSON. Working with Grant was so much fun. I will miss my friend. “