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  2. Sigiriya - Wikipedia

    en.wikipedia.org/wiki/Sigiriya

    Several rock shelters or caves were created during this period. These shelters were made under large boulders, with carved drip ledges around the cave mouths. Rock inscriptions are carved near the drip ledges on many of the shelters, recording the donation of the shelters to the Buddhist monastic order as residences.

  3. AP Human Geography - Wikipedia

    en.wikipedia.org/wiki/AP_Human_Geography

    AP Human Geography. Advanced Placement (AP) Human Geography (also known as AP Human Geo, AP Geography, APHG, AP HuGe, AP HuG, AP Human, HuGS, or HGAP) is an Advanced Placement social studies course in human geography for high school, usually freshmen students in the US, culminating in an exam administered by the College Board. [1]

  4. Geologic time scale - Wikipedia

    en.wikipedia.org/wiki/Geologic_time_scale

    The geologic time scale, proportionally represented as a log-spiral with some major events in Earth's history. A megaannus (Ma) represents one million (10 6) years. The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses ...

  5. AP World History: Modern - Wikipedia

    en.wikipedia.org/wiki/AP_World_History:_Modern

    e. Advanced Placement (AP) World History: Modern (also known as AP World History, AP World, APWH, or WHAP) is a college-level course and examination offered to high school students in the United States through the College Board 's Advanced Placement program. AP World History: Modern was designed to help students develop a greater understanding ...

  6. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    It is the period in which Greek and Roman society flourished and wielded great influence throughout Europe, North Africa and the Middle East. Post-classical historyPeriod of time that immediately followed ancient history. Depending on the continent, the era generally falls between the years AD 200–600 and AD 1200–1500.

  7. Age of Discovery - Wikipedia

    en.wikipedia.org/wiki/Age_of_Discovery

    The Age of Discovery and European exploration involved mapping of the world, shaping a new worldview and facilitating contact with distant civilizations. The continents drawn by European mapmakers of the Age developed from abstract "blobs" into the outlines more recognizable to us today. [6]

  8. Hard rock - Wikipedia

    en.wikipedia.org/wiki/Hard_rock

    soft rock. Hard rock or heavy rock[1] is a heavier subgenre of rock music typified by aggressive vocals and distorted electric guitars. Hard rock began in the mid-1960s with the garage, psychedelic and blues rock movements. Some of the earliest hard rock music was produced by the Kinks, the Who, the Rolling Stones, Cream, Vanilla Fudge, and the ...

  9. Historical climatology - Wikipedia

    en.wikipedia.org/wiki/Historical_climatology

    Historical climatology is the study of historical changes in climate and their effect on civilization from the emergence of homininis to the present day. This differs from paleoclimatology which encompasses climate change over the entire history of Earth. These historical impacts of climate change can improve human life and cause societies to ...