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Yes, though it is hard. Also, preexisting conditions vary, as far as definition, from one company to another. While it is easier to get coverage through an employer, you are able to get it via a private company.
chords to, I've come too far to look back
They can look as far back as they want to. Though most will only look for 5 years.
The question is somewhat unclear - BUT - it can look back as far as necessary to settle or answer the legal question being asked.
Look far enough back, all dogs have.
Three years.
Some states have rules about the length of the employers "look-back" but in reality, the information is out there as a public record, and they can research your adult record for as far back as they wish.
As far north as possible... polar regions preferably. It depends on solar conditions. In 2008 conditions are not favourable. Have a look at http://en.wikipedia.org/wiki/Aurora_(astronomy)
If you take a photograph from far enough above the earth, it looks like a map. Satellite photographs look like maps, for example.
No, they look back three MONTHS on a hair test but they can look back as far as your hair will let them.
Artifacts can date back thousands to millions of years, depending on the material and preservation conditions. The oldest known artifacts, such as stone tools and cave paintings, date back to millions of years ago.
On average about 8.333 minutes - depending on the time of year.