German mathematician Carl Friedrich Gauss constructed the first heptadecagon using a ruler and a compass.
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North Carolina repealed its controversial bathroom law that restricted transgender use.
The Heinkel He 100 fighter set a world airspeed record of 463 mph (745 km/h).
Starbucks first opened its doors in Seattle, Washington, USA.
Hyman Lipman patented the pencil with an eraser on top.
Riots broke out in Iceland when the Icelandic parliament decided to join NATO.
