What is a brain aneurysm? Symptoms, causes, treatment and more

Bleeding in the brain may sound like an extreme medical condition, but millions of Americans are living with unruptured brain aneurysms without knowing it. "Mythbusters" host Grant Imahara was only 49 when he passed away on Monday night, with the cause of death believed to be a brain aneurysm, a Discovery Communications spokeswoman told The New York Times. "Game of Thrones" star Emilia Clarke survived two brain aneurysms, the actress revealed in 2019.