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This Quantum World is an introduction to the subject of quantum mechanics, following the historical development of the theory. Physics and mathematics required, not for the faint of heart.
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Full and fun descriptions of all 50 countries in Europe. Learn about the geography, sights and people in each country - from Austria to Azerbaijan and from Ukraine to the United Kingdom.


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Guacamole is a spicy Mexican paste made from crushed avocado and various seasonings, usually including onions, peppers, garlic and tomatoes. Guacamole is used as a condiment, an ingredient, and as an appetizer when served with tortilla chips.
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