Earring
Ear piercing is one of the oldest known forms of body modification, with artistic and written references from cultures around the world dating back to early history. Gold, silver and bronze hoop earrings were prevalent in the Minoan Civilization (2000–1600 BCE) and examples can be seen on frescoes on the Aegean island of Santorini, Greece. During the late Minoan and early Mycenaean periods of Bronze Age Greece hoop earrings with conical pendants were fashionable. Early evidence of earrings worn by men can be seen in archeological evidence from Persepolis in ancient Persia. The carved images of soldiers of the Persian Empire, displayed on some of the surviving walls of the palace, show them wearing an earring.
Allende meteorite
Allende contains chondrules and CAIs that are estimated to be 4.567 billion years old, the oldest known matter (other carbonaceous chondrites also contain these). This material is 30 million years older than the Earth and 287 million years older than the oldest rock known on Earth, Thus, the Allende meteorite has revealed information about conditions prevailing during the early formation of the Solar System. Carbonaceous chondrites, including Allende, are the most primitive meteorites, and contain the most primitive known matter. They have undergone the least mixing and remelting since the early stages of Solar System formation. Because of this, their age is frequently taken as the "age of the Solar System."