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  1. Twelve people have walked on Earth's Moon. The first one was Neil Armstrong and the last one was Harrison Schmitt. All crewed moon landings took place between July 1969 and December 1972 as part of the United States Apollo program. All twelve people who have walked on the Moon are American men.

  2. 24-hour clock. The 24-hour clock is a way of telling the time in which the day runs from midnight to midnight and is divided into 24 hours, numbered from 0 to 23. It does not use a.m. or p.m. This system is also referred to (only in the United States and the English speaking parts of Canada) as military time [1] or (only in the United Kingdom ...

  3. The list below has some of the most common symbols in mathematics. However, these symbols can have other meanings in different contexts other than math. If x=y, x and y represent the same value or thing. If x≈y, x and y are almost equal. If x≠y, x and y do not represent the same value or thing. If x<y, x is less than y.

    • Semi-Private Naturism
    • Public Naturism
    • Naturism and Religion
    • First Contact with Naturism

    Naturism is not public when only other naturists are present. Access is limited to members of a naturist organization, invited guests, or paying customers at naturist resorts. Rules may allow clothing, but usually not in some areas such as swimming pools.

    Germany has accepted naturism in everyday life. Many beaches have clothing optional areas, and nude sunbathing is allowed in the parks of major cities. Germans and other Northern Europeans have followed the Finnish tradition of the sauna, which is visited nude and may have no separation by gender. In the United States, there are fewer clothing opti...

    Naturism is opposed by many based on religious beliefs. Islam and conservative Judaism have strict rules of modesty in clothing. In Christianity there are wide differences between groups. Conservative Christians also value modesty, but there are also Christian naturists. In India, Hinduism and Jainisminclude individuals who reject clothing along wi...

    Clothing has many functions. Clothing can provide a sense of status, and perhaps class. People who have a higher social statusor are better off have nicer clothes. Clothing also protects: It protects against cold, but it also protects the body from being seen by others. Removing clothing in a public place also means that people are unprotected. Any...

  4. Numbers that are larger than one million are usually either represented using scientific notation, or by words. There are two main ways of using words to write large numbers. The American way or "Short form" for naming large numbers is different from the European way or "Long form" of naming large numbers. ...

  5. Saint Kitts and Nevis - Saint Lucia - Saint Vincent and the Grenadines - Samoa - San Marino - São Tomé and Príncipe - Saudi Arabia - Senegal - Serbia - Seychelles - Sierra Leone - Singapore - Slovakia - Slovenia - Solomon Islands - Somalia - South Africa - South Sudan - Spain - Sri Lanka - Sudan - Suriname - Sweden - Switzerland - Syria.

  6. The September 11 attacks (also known as 9/11) [nb 1] were four terrorist attacks carried out by al-Qaeda against the United States of America. All the attacks happened on the morning of Tuesday, September 11, 2001. The attacks killed almost 3,000 people, including the 19 attackers, [2] making it the deadliest terrorist attack of the 21st ...