Today I went to the Museum of Natanal History. 

And I learnded about many thing. What I most remember is when was the Earth formed.

The Universe was born about 15 billion years ago during the big bang.

About 4.6 billion years ago.  The earth was formed. 

Anyway, Cyanobacteria are living cells that produce oxgen throug Photosynthesis.  And then the Animate things was began to appear like Dinosaurses.  Tyrannosauruses, Herbivorous dinosaurs  and Troodon.  Tyrannosaurus is popular dinosaurs, Herbirorous dinosaurs is protected them sclves with their horns.  Troodon had the most advanced brains. 

Today I learned interested.   It's very wonderful place.