Woodrow Wilson’s speech on January 8, 1918, changed the course of U.S. foreign policy and international diplomacy.

In 1531 a "Lady from Heaven" appeared to Saint Juan Diego, a poor Indian from Tepeyac, a hill northwest of Mexico City. She identified herself as the Mother of the True God and instructed him to have ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

Optical physics is the study of the fundamental properties of light and its interaction with matter. This includes classical optical phenomena such as reflection, refraction, diffraction and ...

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