An introduction to spacetime by yours truly (only requires Pythagorean theorem): https://brilliant.org/wiki/spacetime/
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
An introduction to spacetime by yours truly (only requires Pythagorean theorem): https://brilliant.org/wiki/spacetime/
