sundial

/Tag: sundial
16 09, 2017

West Asian mathematics – history of math

By |2019-09-04T05:49:16-07:00September 16th, 2017|West Asia|0 Comments

History of math: Sumerian multiplication table (2700 BC) Cuneiform multiplication table Once people in West Asia figured out how to write down numbers, about 3500 BC, they quickly began to want to use cuneiform to write down other mathematical ideas. (Read more about the invention of numbers) The earliest example of this that we have is from about 2700 BC. It [...]

8 09, 2017

History of Time – sundials and clocks

By |2018-10-28T14:57:08-07:00September 8th, 2017|Egypt|0 Comments

Egyptian sundial (Valley of the Kings, Egypt, ca. 1300 BC). It's on a small chip of limestone so you could carry it around. Using the sun to tell time During most of human history, people told time by the sun. They arranged to meet at dawn, when the sun came up. Or they met [...]

21 07, 2017

Sundial project – How to make a sundial

By |2019-04-04T05:11:01-07:00July 21st, 2017|India|0 Comments

Making a sundial in your yard How to make a sundial You'll need to do this project on a sunny day. Get a wooden stick, about a meter long, and put it in a place that will be sunny all day, like a south-facing windowsill or the middle of your yard. Who invented [...]

21 07, 2017

Who was Arya Bhata? Astronomer and Mathematician

By |2019-02-04T05:03:53-07:00July 21st, 2017|India, Religion|0 Comments

Arya Bhata worked at Nalanda University, in Patna, India Where was Arya Bhata from? Arya Bhata was born about 476 AD in India. He probably came from central India, though nobody knows for sure. The Chola Empire Indian math More Indian science All our ancient India articles Where did Arya Bhata go to college? When Arya [...]

1 06, 2017

Sewing, wheels, and steel – Central Asian science

By |2018-09-20T06:17:32-07:00June 1st, 2017|Central Asia, Science|0 Comments

Central Asian science: A clay pot with a drawing of a wheeled cart from what is now Poland, about 3500 BC What was invented in Central Asia? Many of the world's most useful inventions come from Central Asia: sewing, leather, cart wheels and spinning wheels, burning coal. And then also the compound and [...]