Author: poso nasution // Category:

Who want to be a scientist, that can explain to us the phenomena of earth and sky or solar system .........???

OK ,lets see to them,they are the best in their country and show their country ,that they are is the clever peoples .
and can resolv the problem in this world..


yesss my friend please wait me ...
I'll join with you in IESO (INTERNATIONAL EARTH SCIENCE OLYMPIAD)

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