Electric lights have revolutionized our lives, but as illumination increases, the toll on wildlife and human health is becoming harder to ignore. On a clear night in , an earthquake rumbled beneath Los Angeles and caused a city-wide power outage just before dawn. Startled awake, some residents who had stumbled outside called various emergency centers and a local observatory to report a mysterious cloud overhead. Arguably, the light bulb is the most transformative invention humans have introduced to this planet. By flicking a switch or pushing a button, we can push back the veil that would naturally shroud our lives each night.
GALILEO: Georgia's Virtual Library
NASA - Societal Impact of the Space Age
Coalition military victory;    Egyptian political victory . The aims were to regain control of the Suez Canal for the Western powers and to remove Egyptian president Gamal Abdel Nasser , who had just nationalised the canal. The episode humiliated the United Kingdom and France and strengthened Nasser. On 26 July , Nasser nationalised the canal, which prior to that was owned primarily by Britain and France.
How Technology Is Changing the Medical and Health Care Field
Science labs usually ask you to compare your results against theoretical or known values. The difference between your results and the expected or theoretical results is called error. So, you need to know the different types and sources of error and how to calculate them. One method of measuring error is by calculating absolute error , which is also called absolute uncertainty. This measure of accuracy is reported using the units of measurement.
The COVID pandemic has had far-reaching economic consequences beyond the spread of the disease itself and efforts to quarantine it. As the SARS-CoV-2 virus has spread around the globe, concerns have shifted from supply-side manufacturing issues to decreased business in the services sector. Supply shortages are expected to affect a number of sectors due to panic buying , increased usage of goods to fight the pandemic, and disruption to factories and logistics in mainland China.