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The Bradshaw Foundation provides an online learning resource to promote the study of early humankind’s artistic achievements and to foster principles of research and of conservation. Its areas of focus are archaeology, anthropology and genetic research, with the primary objective to discover, document and preserve ancient rock art around the world.
Magical amulet decoded. It protected owner from blood-sucking spirits.
Many millions of years ago, the world was one. This nifty map shows this Pangea supercontinent overlaid with modern country borders.
A new discovery in the mountains of northern Israel has caused significant excitement for geologists around the world. While working in the Zevulun
For centuries, humankind has looked at Mars from afar. In the past 75 years, space exploration has made it possible to create a map of Mars in extreme detail.
AGU galvanizes a community of Earth and space scientists that collaboratively advances and communicates science and its power to ensure a sustainable future
This eclipses the Great Oxidation Event.
There’s a monstrous iron serpent moving inside Earth's core. Traveling at around 50 kilometers (31 miles) per year, it is currently based in th
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The vocabulary we use to describe landforms and landscapes comes from languages around the world. It's a prevalent example of how we rely upon the traditional ecological knowledge of peoples who know their lands best.Here are some of the etymologies: Alpine: From Latin Alpes "The Alps"Archipelago: From Greek Arkhi Pélagos "chief sea" referring to the…
Behold the glory of the Unified Geologic Map of the Moon, which brings decades of data into one map, revealing the potential for exploration.
There are over fifty known nephrite occurrences in British Columbia. These are located in the Cassiar, Cry and Dease Lake, and Mount Ogden areas, as well as in Southern British Columbia.
Most of “Greater Adria” is now trapped in Earth’s mantle, but some of its rocks ended up high in the Alps
Earth's inner core is thought to be solid, which means it should support shear waves. However, the small size of the inner core makes detecting shear waves very difficult. Tkalčić and Phạm correlated different types of seismic phases to finally determine the speed of shear waves in Earth's inner core (see the Perspective by Irving). The detection of the waves closes an 80-year quest to find them and confirms a solid, but soft, inner core.
Science , this issue p. [329][1]; see also p. [294][2]
Seismic J waves, shear waves that traverse Earth’s inner core, provide direct constraints on the inner core’s solidity and shear properties. However, these waves have been elusive in the direct seismic wavefield because of their small amplitudes. We devised a new method to detect J waves in the earthquake coda correlation wavefield. They manifest through the similarity with other compressional core-sensitive signals. The inner core is solid, but relatively soft, with shear-wave speeds and shear moduli of 3.42 ± 0.02 kilometers per second and 149.0 ± 1.6 gigapascals (GPa) near the inner core boundary and 3.58 ± 0.02 kilometers per second and 167.4 ± 1.6 GPa in Earth’s center. The values are 2.5% lower than the widely used Preliminary Earth Reference Model. This provides new constraints on the dynamical interpretation of Earth’s inner core.
[1]: /lookup/doi/10.1126/science.aau7649
[2]: /lookup/doi/10.1126/science.aav2296
An enormous mass of warm rock is rising slowly but steadily toward the surface of New England and for now, researchers cannot explain this kind of abrupt activity. "Our study challenges the established notion of how the continents on which we live behave," The upwelling we detected is like a hot air balloon, and we infer that something is rising up through the deeper part of our planet under New England.
London Lectures: Free public lectures
The search for flight MH370 has resulted in some of the most detailed maps of the deep ocean ever created, revealing the sea bed in incredible resolution.
To many, tongue twisters may seem like mere childish wordplay. However, the most famous tongue twister of all carries a far deeper significance than you mi
A primer on the "technosphere"—Earth's newest layer.
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