This is a nice list of factoids. Read it at the linked site!!!!
The layer, a sort of protective barrier called the heliosphere, shields us from harmful cosmic radiation. Its existence defies all expectations about what the edge of the solar system might look like.
Fisher’s response: “We thought we knew everything about everything, and it turned out that there were unknown unknowns.”
In other words: We don’t know what we don’t know until we know that we don’t know it.
Life is funny that way. You think you’ve got the world wrapped up in string, only to watch some bit of news come along to unravel your comprehension of how things work.
One thing we did expect: that 2009 would be full of strange and wonderful revelations.