I've always been fascinated by these artifacts; especially ones that predate humanity or are of unknown origin.

I think some of these could be indications that we've been visited by extraterrestrials in the distant past; the Baigong Pipes being a good example of such.

Another interesting one is the stone spheres of Costa Rica. Has anyone ever done any research into these kinds of things?

Here's Wikipedia's list of out of place artifacts:
Out-of-place artifact - Wikipedia, the free encyclopedia

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I love Vanilla Coke

Great topic Webnower

I've read a few times about those rock spheres, same thing for some of the artifacts in the list from the wiki link.
I never get enough of this stuff !

I particularily like this one: Antikythera mechanism - Wikipedia, the free encyclopedia
That's pretty amazing, it's a little computer from 2000 years ago.

Num7

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Not as easy as it used to be.

Num,

Your zero fell off.

Webnower,

You know I've done this research. Are you hinting?

Harte

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Aristotle maintained that women have fewer teeth than men; although he was twice married, it never occurred to him to verify this statement by examining his wives' mouths.

Most people would die sooner than think; in fact, they do so.

Bertrand Russell

Oups

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Not as easy as it used to be.

I have always been stumped by the sparkplug they found in a rock
shows up at the top of the list on google search for
sparkplug in a rock
should find it, did for me. now just how did they do that huh?????
PS
had to go find it again
got it, this is one of the sparkplugs imbedded in a rock
www.s8int.com
hope that one works
well when I do a google ot goes to that site but can't seem to make a link for the rite page but theres a lot of this type stuff there for the inquireing minds

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these words are just the ramblings of a domesticated savage.
live free or die, the choice is yours.
all men die some day,few men live, realy live, even one day there whole life.

Easy - it wasn't a rock, it was a concretion, though the pseudoscientists have gone as far as to state it was a geode, for God's sake (literally), which was, of course, a lie.

The sparkplug was a Champion brand sparkplug from a tractor built in the 1920s.

This OOPART is known as the Coso Artifact and you can find out about it and other such clap trap HERE.

Specifically, in THIS article from the above-linked website (Doug's Archaeology Site.)

Put Doug's site in your bookmarks. It helps!

Harte

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Aristotle maintained that women have fewer teeth than men; although he was twice married, it never occurred to him to verify this statement by examining his wives' mouths.

Most people would die sooner than think; in fact, they do so.

Bertrand Russell

I guess this one fits pretty well in that topic:

Mystery as century-old Swiss watch discovered in ancient tomb sealed for 400 years
18th December 2008

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Not as easy as it used to be.

I wasn't even aware the made watches the size of rings. THats pretty awesome.

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When you're sick, you don't feel good.