Eras
Eras Intro
David introduces the song with clever use of a Metronome.
Eras Singalong
A frenetic whirl through the Pre-Cambrian, Palaeozoic, Mesozoic, and Cenozoic geological eras.
Eras Tutor
The tutor video for Eras.
A frenetic whirl through the Pre-Cambrian, Palaeozoic, Mesozoic, and Cenozoic geological eras.
