On this day in science history: 25 November

From the days of ancient technology to modern science - find out what happened on this day in the history of science.

25th November 2017
1915 - Albert Einstein presents General Relativity © ullstein bild/ullstein bild via Getty Image

© ullstein bild/ullstein bild via Getty Images

1915 - Albert Einstein presents General Relativity

Albert Einstein presents the field equations of general relativity to the Prussian Academy of Sciences. Before this Newton’s law of universal gravitation had been accepted for more than 200 years even though Newton himself saw flaws in his theory. The theory of General Relativity provided the foundation of our understanding surrounding black holes, regions of space where gravitational attraction is so strong that not even light can escape and is also part of the framework of the standard Big Bang model of cosmology.

2002 - The US government introduces the Homeland Security Act

The US government introduces the Homeland Security Act  © Stephen Jaffe/AFP/Getty Image
© Stephen Jaffe/AFP/Getty Image

Months after the 9/11 attacks the US government introduces the Homeland Security Act. The main objective of the act is to prevent terrorist attacks within the US in the future, but not since president Truman created the Department of Defence in 1947 did the federal government undergo such a dramatic reconstruction. The act aimed to detect and eliminate emerging terrorist threats by removing information firewalls between government agencies, and centralising the unprecedented flood of surveillance data made possible by the USA Patriot Act. The act caused much controversy as it meant reduced privacy, increased government secrecy and power, and strengthened government protection of special interests.

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