Ancient Egyptians transported pyramid stones over wet sand

Physicists from the FOM Foundation and the University of Amsterdam have discovered that the ancient Egyptians used a clever trick to make it easier to transport heavy pyramid stones by sledge. The Egyptians moistened the ...

One fractal quantifies another, mathematicians find

To humor mathematicians, picture a pile of sand grains – say, a billion – in one square of a vast sheet of graph paper. If four or more grains occupy a single square, that square topples by sending one grain to each of ...

Even with defects, graphene is strongest material in the world

In a new study, published in Science May 31, 2013, Columbia Engineering researchers demonstrate that graphene, even if stitched together from many small crystalline grains, is almost as strong as graphene in its perfect crystalline ...

New theory on the origin of water on Earth

(PhysOrg.com) -- A new theory on the source of terrestrial water has been validated by an international team led by Professor Nora de Leeuw (University College London) using computational research.

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