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Brightening Up Traffic

13 May 2022

Red signifies danger in many cultures. From a distance, green is highly visible by day. At night, yellow is easier to see. That briefly explains the choice of colours on every traffic light. But...

You Can Still See the Division of East and West Berlin from Space

7 Jun 2018

Berlin might be united now, but evidence of its 40-year history of division still remains. ...

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