Definition An atmosphere does not abruptly end at any given height, but becomes progressively thinner with altitude.

This model is thinner than the original polycarbonate MacBooks, and it made use of a unibody aluminum case with tapered edges.

So they built the blade of light, and it's a very thin ribbon of steel, the world's probably the flattest and thinnest suspension bridge there is, with cables that are out on the side.

It has polar caps. It has an atmosphere somewhat thinner than ours, so it has weather. So, it's very similar to some extent, and you can see some of the features on it, like the Grand Canyon on Mars, or what we call the Grand Canyon on Mars.

However, that point of view came under substantial criticism circa in the wake of various security scandals including mutual fund timing episodes and, in particular, the backdating of option grants as documented by University of Iowa academic Erik Lie and reported by James Blander and Charles Forelle of the Wall Street Journal .