" AC/DC guitarist and co-founder Malcolm Young dead at 64

AC/DC guitarist and co-founder Malcolm Young dead at 64

Mashable! by Adam Rosenberg  /

Malcolm Young, whose crunching guitar provided the rhythmic backbone of AC/DC for more than 40 years, died on Saturday at the age of 64.

Young, who co-founded the Australian hard rock band with his younger brother Angus in 1973, stuck with the band — and, by most accounts, served as its leader — until he retired in 2014. His retirement was prompted by the onset of dementia.