Can People Live on Mars?
人類能住在火星上嗎？
Introduction
Slava Turyshev from NASA studied Mars. He wanted to see if humans can change Mars to live there.
來自 NASA 的 Slava Turyshev 研究了火星，他想看看人類是否能將火星改造以供居住。
Main Body
Mars is very cold and has no air. To live there, humans need a lot of gas and oxygen. We need huge mirrors in space to make the planet warm. These mirrors must be bigger than Asia.
火星非常寒冷且沒有空氣。為了在當地生存，人類需要大量的氣體與氧氣。我們需要在太空中設置巨大的鏡子，讓該行星變暖。這些鏡子的尺寸必須比亞洲還要大。
We need a lot of gas to make air. We do not have the machines to move this gas from space to Mars. We have the materials, but we cannot move them.
我們需要大量氣體來製造空氣。但我們目前沒有能將這些氣體從太空運送到火星的機器。雖然我們擁有材料，但無法運送。
Making oxygen needs a lot of power. It needs 20 times more energy than all people on Earth use in one year. We do not have this much energy now.
製造氧氣需要大量能量。其所需能量是地球上所有人一年用電量的 20 倍。我們目前沒有這麼多能量。
Conclusion
Humans can visit Mars. But we cannot change Mars into a new home because we do not have the technology.
人類可以造訪火星，但因為我們缺乏技術，無法將火星變成新家。
Vocabulary Learning
The Power of "CAN" & "CANNOT"
In this story, the author uses one simple word to show what is possible and what is impossible. For A2 learners, mastering can is the fastest way to talk about ability.
1. The Positive (Possibility) → can
- "Humans can visit Mars."
- Meaning: It is possible. We are able to do it.
2. The Negative (Impossibility) → cannot
- "We cannot move them."
- "We cannot change Mars."
- Meaning: It is impossible. We do not have the ability.
Quick Comparison Table
| Concept | Word | Example from Text |
|---|---|---|
| ✅ Yes | can | humans can change Mars |
| ❌ No | cannot | we cannot move them |
Pro Tip: In daily English, people usually say can't instead of cannot. They mean the same thing!