I wanted to make a metal family tree. i know there are many groups that are metalish or just hard rock that borders heavy metal. I wanted a pure metal tree. Groups like zeppelin are kinda metal, but also hard rock but feel they need to be there for influences of others, feel free to copy n paste, download it etc and add your bands to the top. wanted to keep it kinda chronological. I tried to keep away from 1 hit guys like Iron Butterfly even tho Inagada davida (in the garden of eden) is a heavy sone.. Blue cheer etc.. I am staying away from heavy progressive rock bands like rush, i love them but are way more progressive.. If we all add 1 more band, think we wud have a cool tree. cheers and rock on..Oh and My bad . Ronie James Dio should be on the rung around OZZY,