Today I learned about solar system.

The universe was born 15 billion years ago.

And our planet Earth was formed 4.6 billion years ago.

the planets closest to the sun is Mucury,Venus,Earth

Mars,Jupiter,Saturn,Uranus and Neptune.

And I also learnd about dinosaurs.

carnivoreous dinosaurs ate meat and

herbivorous dinosaurs ate grass asd leaves.

Troodon weighed about 22.7kg and there brain weighed 37~45kg.

These dinosaurs had the most advanced brains.

The carnivore dinosaurs can see straight,

but herbivorous dinosaurs can see left and right sight.

And carnivores have strong teeth and sharp claw

but herbivore didn't have them.

Acrocanthosaurs were frightening and ate meat.

There biggest feature was the long saw-like protrusion

that developed from there neck to there tailbone.

Elephant's trunk is made up of numerous muscells.

It works like human's hand.Elephants breathe through it.

Cyanobacteria are living cells that produce oxygen

that produce oxygen through photosynthesis.