Stela 18 dating from 100 BC to 300 AD in foreground, with Building Group IV, Ceremonial Complex in the background, Monte Alban, UNESCO World Heritage Site, Oaxaca, Mexico, North America

Stela 18 dating from 100 BC to 300 AD in foreground, with Building Group IV, Ceremonial Complex in the background, Monte Alban, UNESCO World Heritage Site, Oaxaca, Mexico, North America

Urn dating from between 100 BC and 200 AD, from Tomb 77, Monte Alban, National Museum of Anthropology, Mexico City, Mexico, North America

Chysauster Village, dating from circa 100 BC, Cornwall, England, United Kingdom, Europe

Dun Carloway (Dun Charlabhaigh) broch dating from between 100 BC and 100 AD, one of the best preserved in Scotland, Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Dun Carloway (Dun Charlabhaigh) broch dating from between 100 BC and 100 AD, one of the best preserved in Scotland, Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Porta Palatina, Roman towers and archways, each tower has 16 sides, dating from between 100 and 30 BC, Turin, Piemonte, Italy, Europe

Skara Brae, a Neolithic village constructed in 3,100 BC, Orkney Islands, Scotland

Skara Brae, a Neolithic village constructed in 3,100 BC, Orkney Islands, Scotland

Skaill House, a merchants house and museum near Skara Brae, a Neolithic village constructed in 3,100 BC, Orkney Islands, Scotland

Killer whale (Orcinus orca), adult male, passing down Johnston Straight. Vancouver Island, Canada.

Mexico, Federal District, Mexico City, Museo Nacional de Antropologia Urn 100 BC-200 AD from Monte Alban.

Precolumbian Ceramics Mochi Culture a ceramic stirrup-spout vase from 100-800 BC handpainted with figure that is part human and part bird, Peru