以下为课件内提取的文本内容，仅供参考：

Galileo Galilei showed us that the earth moves around the sun, not the other way around.

Zhang Heng made maps of the stars and showed us how the position of the stars changed from season to season.

“Knowledge is power”.

What do great scientists have in common?

How did they make such achievement?

Always want to know more;

Never being satisfied with a simple answer;

Always looking for new questions;

Always asking why, how and what if;

Believing in what they do;

Being curious, creative, imaginative, confident, careful, knowledgeable, hard-working, intelligent, conscientious;

Being full of creativity, imagination, confidence, curiosity, intelligence;

Who is your favourite scientist?

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Homework

Finish writing your favourite scientist.

Stephen Hawking is disabled, but nothing can

stop his dream from coming true.

2. Hawking can not speak like ordinary people,

but he can give us lectures and make himself

understand.

3. Universe doesn’t have any boundary or edge, the

laws of science would hold everywhere, including at the beginning of the universe.

4. Knowledge has no boundaries, scientists should

be always on fire for seeking truth.

How do you understand the title “NO BOUNDIRIES”?