# greatlakes worldwaterday

Al-Biruni (about 1,000 years ago) measured the circumference of the Earth 🌍 with an accuracy of 99.7% compared to today’s accepted value.

157 255
2018-08-30

Al-Biruni (about 1,000 years ago) measured the circumference of the Earth with an accuracy of 99.7% compared to today’s accepted value.

89 141
2018-05-22

DYK the shoreline is equal to almost 44 percent of the circumference of the earth?

25 16
2016-03-23