I'm not sure if this is a duplicate.
Whenever physics buffs talk about Einstein's relativity (I forget which kind) at high speeds, they always talk about "length contraction", or shortening of the object due to the high speeds. This happens even at the relatively low speeds we travel at every day, but there is so little contraction we don't notice it. However, these physics buffs only talk about length contraction, implying a single dimension. Why do they never talk about contraction in more than 1 dimension? Is it because the contraction happens in the direction the object is going, which is usually only a single direction? If so, are there any cases which would involve 2- or 3-dimensional contraction?