A recent analysis, published in the Bulletin of the French Prehistoric Society, has shown that the slab is a three-dimensional representation of the River Odet valley in Finistère, France. The Saint-Bélec slab discovered in 1900 by Paul du Châtellier, in Finistère, France, is dated to between 1900 BCE and 1640 BCE. With the Age of Discovery, during the 15th to 18th centuries, world maps became increasingly accurate exploration of Antarctica, Australia, and the interior of Africa by western mapmakers was left to the 19th and early 20th century.Īntiquity Bronze Age "Saint-Bélec slab" Since Ptolemy, knowledge of the approximate size of the Earth allowed cartographers to estimate the extent of their geographical knowledge, and to indicate parts of the planet known to exist but not yet explored as terra incognita. The developments of Greek geography during this time, notably by Eratosthenes and Posidonius culminated in the Roman era, with Ptolemy's world map (2nd century CE), which would remain authoritative throughout the Middle Ages. World maps assuming a spherical Earth first appear in the Hellenistic period. The earliest known world maps date to classical antiquity, the oldest examples of the 6th to 5th centuries BCE still based on the flat Earth paradigm. Ron Blakey is professor emeritus of geology at Northern Arizona University and founder of Colorado Plateau Geosystems Inc.Further information: List of historical maps and history of cartography Tim Montenyohl is a 3-D Artist and Animator at International Mapping. Slide through the timeline above to explore how the globe has changed over seven major “snapshots” in our climate history, and to see how it might look in the far future.Īlex Tait is Vice President of International Mapping in Ellicott City, Maryland. Understanding how humans are affecting Earth’s system requires a better grasp on the natural cycles and events that have shaped our planet through deep time. But scientists agree that human activity has now begun to influence the planet, changing the climate and drastically altering surface conditions. This constant reconfiguration has been a huge driver in the development of life on Earth.
Earth is a planet defined by change, swinging through periods of intense heat and deep freeze even as oceans and continents are reshaped by the actions of plate tectonics.
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