This is the point where the protostar, became a star and thermal pressure generated by nuclear fusion, effectively neutralized the gravitational pressure, reaching hydrostatic equilibrium. Plate tectonics describes the large-scale motions of the Earth's lithosphere. The polar bears and other Arctic animal species are becoming an endangered species, since the glaciers have been melting as a result of global warming. In the plant kingdom, the flowering plants appeared for the... Parenting - Key to being a Patient Parent In a 1999 study by York University, patience topped the list of skills parents

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