Why Go Further?

Refine measurements of E and TE
at l>50 to further test paradigm
at l<50 to further constrain re-ionization

Push B measurements at l>100 to detect lensing signal
get info on neutrinos and dark energy

Push B measurements at l<100 to search for gravity waves
potential probe of inflationary epoch
"see" back to way beyond last scattering surface...

QUaD aims to do first and second