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Giving freight rail tracks a boost

The big chunks of rock—crushed limestone or dolomite that engineers call ballast—that keep railroad tracks in place look like a solid footing even as freight cars rumble overhead.

dateMay 15, 2015 in Engineering
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What shape is the universe?

The universe. It's the only home we've ever known. Thanks to its intrinsic physical laws, the known constants of nature, and the heavy-metal-spewing fireballs known as supernovae we are little tiny beings ...

dateMay 12, 2015 in Astronomy
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'Dead zones' found in Atlantic open waters

A team of German and Canadian researchers have discovered areas with extremely low levels of oxygen in the tropical North Atlantic, several hundred kilometres off the coast of West Africa. The levels measured ...

dateApr 30, 2015 in Earth Sciences
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