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Monthly Archives: February 2020
History of Aerial Photography
The first real Aerial photograph was taken around 1826. The first aerial photograph was taken in 1858 by Felix Tournachon, known as Nadar, from a tethered balloon over the Bievre Valley in France. Those photographs no longer exist. The oldest surviving aerial … Continue reading
NASA Flights Detect Millions of Arctic Methane Hotspots
Originally posted on Exposing the Big Game:
FEBRUARY 13, 2020 The image shows a thermokarst lake in Alaska. Thermokarst lakes form in the Arctic when permafrost thaws. Credit: NASA/JPL-Caltech › Larger view Knowing where emissions are happening and what’s causing…
Posted in earth
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Social Groups:The Concept
A Social Group is a collection of people who interact with each other and share similar characteristics and a sense of unity. A social category is a collection of people who do not interact but who share similar characteristics. For example, women, men, … Continue reading
Posted in Class Notes, earth, society
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The Concept of Social Space
Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional … Continue reading
Posted in earth, society, Space
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