Hello, my name is Yang Doe Hun.

Today I went to Seoul National Museum of

History to join mariestory. In the first class I

learned about a huge explosion named the "Big

bang". The "Big bang" was an explosion between

the comets and some huge rocks. The rocks

made first the Sun, Mercury, Venus, Earth, Mars,

Jupiter, Saturn, Uranus and Neptune. The Sun is

a "Fixed star" that glows itself. There are many

other planets that are very special for some

other reasons. At the time after "Big bang" the

earth was a planet that was made of magma.

After that period some rocks fell and made lands.

And then a big huge heavy rain fell so the first

sea was created. After  that period small cells

began to evolve, and

little fish were born. And then it was the

"Paleozoic Era". Then "Mesozoic Era"

started. At that time some dinosaurs were born

and they split into two species, Carnivore and

Herbivorous. Carnivores ate meat and

Herbivorours ate vegatables .The most frightning

carnivore was the T­¡ªRex. It's jaws were

enormous and it ate lots of meat in one day.

But the dinosaur with the most advanced brain

was Troodon. Like this Carnivore was smart and

frightning then what was the characteristic of

Herbivours?

Herbivours defended themselves with their

bodies.

For example Triceratops defended themselves

with their two big horns. After this class i learned

about our present home earth's old history. I was

really satisfied the class very much.