When a night at a restaurant or bar finally comes to a close, most Americans engage in an instinctive ritual. They dig into their wallets, fiddle with their smartphone calculators, and then decide how ...

Holdings from the library at the Goddard Space Flight Center, which includes unique documents from the early 20th century to the Soviet space race, will be warehoused or thrown out. By Eric Niiler Our ...

Individual aseismic areas move as rigid plates on the surface of a sphere. Application of the Mercator projection to slip vectors shows that the paving stone theory of world tectonics is correct and ...