Archeologists, scientists and photographers have found and preserved some of mankind's most unbelievable artifacts. From big to small and from old to ancient, these items will defiantly give you a feeling of just how old we humans are, and what amazing things we have created. 

The oldest working clock in the world:

The Salisbury cathedral clock is a large iron-framed clock without a dial located in the aisle of Salisbury Cathedral, supposedly dating back to 1386.

Oldest known trousers:

About 3,000 years old, this pair of trousers was discovered in a Chinese grave in the ancient Yanghai graveyard.

Oldest known photograph of a US President:

John Quincy Adams, the sixth President of the United States (1825 to 1829), the picture itself is from 1843.