Videos
Arya, Where Are You?
274
The Grid on The Earth
201
The Naming
294
Minutes and Seconds
78
Summary
60
Why the Unit Degrees?
153
Important Latitudes
188
Summary
22
Local Time
530
Standard Time
561
Summary
48
International Date Line
446
Why Is the IDL Not a Straight Line?
64
Great Circles
271
Summary
44
Our Place in The Universe
457
Evolution of The Earth
475
Earth as a Planetary Object
245
Summary
145
The Earth's Structure
247
Continental Drift Theory
235
Summary
108