The article I stumbled upon today is titled "6 Insane Discoveries That Science Can't Explain," by Andy Guerriero.
The first mystery is titled The Voynich Manuscript. It is an ancient piece of writing that virtually no one alive today can decipher. It has puzzled military code-breakers, cryptographers, mathematicians, and linguists. Not even a single word has been discovered....
Secondly is the The Antikythera Mechanis, a complex piece of machinary found near a shipwreck in Greece. Expert's best guesses suggest it was used to determine astrological positions. The only problem - it was made in 100BC before any laws of gravity or direction were established.
The Baigong Pipes are a complex system of pipes running through mountains in China, where civilization has never been present. The pipes all vary in size and lead to different destinations, and were created in a time shortly after fire was even discovered. Another strange note - despite the hundreds of years the pipes have spent within the mountain, they are clean of debris.
The Giant Stone Balls of Costa Rica are spherical balls littered around composed of volcanic rock. The size varies from golf ball to wrecking ball, and appear to serve no definite purpose. Inhabitants of Costa Rica have tried cracking the rocks open in hopes of finding treasure, but nothing has been found.
There are 2 additional explorations found on the site
http://www.stumbleupon.com/su/1b9Ujn/www.cracked.com/article_16871_6-insane-discoveries-that-science-cant-explain.html
