  The early time behaviour of brane-world models is analysed in the presence of
anisotropic stresses. It is shown that that the initial singularity cannot be
isotropic, unless there is also an isotropic fluid stiffer than radiation
present. Also, a magnetic Bianchi type I brane-world is analysed in detail. It
is known that the Einstein equations for the magnetic Bianchi type I models are
in general oscillatory and are believed to be chaotic, but in the brane-world
model this chaotic behaviour does not seem to be possible.
