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15 09, 2017

West Asian science – Mesopotamia and Iran

By |2019-09-04T05:49:39-07:00September 15th, 2017|West Asia|0 Comments

The constellation Orion What did Mesopotamians invent? From the Stone Age through the Islamic empires, great scientific discoveries have streamed out of West Asia. West Asia is one of the places where farming got started, and maybe the sailboat. Farming  Early ships and sailing Numbers and writing The pottery wheel All our West Asia articles The Sumerians developed the [...]

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 [...]

19 08, 2017

What is Time? – Time and space in Physics

By |2018-05-31T11:49:26-07:00August 19th, 2017|Physics, When|0 Comments

Time and space: a sundial from Ukraine (ca. 1300 BC) - one of the two oldest sundials in the world Are time and space the same thing? Nobody knows what time is, or how it works. Time seems to be closely related to space, and it's possible that space and time are different ways [...]

17 08, 2017

Acceleration – simple physics

By |2018-05-31T11:49:28-07:00August 17th, 2017|Physics|0 Comments

Tegla Loroupe, Kenyan runner Acceleration is how much your speed changes in a certain amount of time. Picture yourself standing in front of your house. When you stand still, your acceleration is zero. When you begin to walk, your speed is changing - that's what acceleration is - it measures how fast your speed [...]

17 08, 2017

Newton’s Laws of Motion – Movement – Physics

By |2018-05-31T11:49:25-07:00August 17th, 2017|Physics|0 Comments

Light takes years to reach us from these stars far away in space. When solid objects move through space, they follow certain rules that let us predict how they will act. We call the first three rules Newton's Laws of Motion, and they say that: An object in motion tends to remain in motion, and an [...]

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 [...]