Mystery of Time
We are all familiar with time. We use time everywhere all the time. Time is absolutely central to every endeavor of humankind yet we don’t understand time enough. Time is important to Physics, Biology, Medicine…
#Physics
2 posts tagged Physics, by Noman Ghani.
How Eratosthenes Measured the Size of Earth
The size of Earth was first measured in Egypt by Eratosthenes in about 235 BC. He calculated the circumference of Earth in the following way. He knew that the Sun is highest in the sky at noon on the day of the summer…