10. All the other planets and stars we've ever seen are round

10. 我們所見到的所有的行星和星球都是圓的

and there's no reason to indicate that the earth should be any different.

所以認為認為地球不一樣的，都是在無理取鬧

9. Time Zones. Day and night happen at different times at different places on earth

9. 時區。在世界的不同地方，不同地區的時間都不同，也不同時都是白天/夜晚

- in fact, it's always day somewhere and night somewhere else.

總歸有一些地方正處於白天，另一些 地方正處於夜晚

8. The Coriolis Effect means freely moving things (like cannonballs or hurricane winds) are deflected to the right -

8. 科里奥利效應，也就是自由移動的物體  (比如炮彈或者龍卷風) 都會向右偏轉 -

but only if you're north of the equator. If you're south of the equator, they're deflected left.

但物體必須處於赤道北邊，如果在赤道南邊，它們就會向左邊偏轉

7. Triangles. If you walk 10,000km straight along the earth's surface,

7. 球面三角。如果你沿著地球表面向前走一萬公里

turn 90° to your right, walk 10,000km more, turn right again

再向右轉 90 度，再走上 一萬公里，還是向右轉

and walk another 10,000km, you will be back to where you started, having successfully made a triangle with three 90° angles.

又走上一萬公里，那麼你將會回到出發的 地方，此時你用三個直角構造了一個三角形

As any geometry student can tell you, this is impossible on a flat surface.

那些學地理的學生會告訴你，在平面上，這是不可能發生的

6. The sun, in general, gets lower and lower in the sky as you travel away from the equator

6. 太陽。總的來說，天空中太陽的位置，在你和赤道距離逐漸增加時越来越低

and you can use this to directly measure the earth's curvature.

你可以以此來測量地球的彎曲程度

Pick two places a few hundred miles directly north and south of each other

選擇同一經度上的兩個相距 幾百公里的地點

and at noon, measure the shadows cast by a vertical meter-stick at each location.

中午時，在兩個地方放置豎直木棒並 測量投影的長度

You can use the shadow-lengths to figure out the angle between the sticks

你可以用所測量的影長和實際長度經過計算，得到兩根棒間的夾角

and once you add in how far apart they are, you can calculate the earth's curvature.

一旦你將兩根木棒間距離加到計算過程中，就可以計算出地球的彎曲程度。

5. The stars at night change as you go north or south - for example, Orion is upside down if you're in Australia!

5. 夜晚，天空中的星星和你所處的緯度有關。 舉例來說，在澳大利亞看，獵戶星座 (和北半球相比) 倒了過來！

4. Ferdinand Magellan (and many people afterwards) circumnavigated the earth.

4. 麥哲倫 (Ferdinand Magellan) 和很多後人都曾環遊世界

That means he left headed west, continued going west, and came back to where they started, still going west .

也就是說，船隊在出發時向西航行，航程中也一直向西，最後 他們回到了出發點，此時航向仍然向西

(Actually, Magellan was dead, but one of his ships - led by Juan Sebastián Elcano - finished the journey.)

(實際上，航程結束時麥哲倫早就歸西了，而航程結束時，船隊的領航者是 Juan Sebastián Elcano 。)

If you head west and circumnavigate the earth yourself,

如果你一直向西航行獨自環遊地球

you'll be able to tell because you'll observe one fewer sunrise than everyone who stays at home.

你就能明白，因為你宅在家的人少經歷一次日出

3. The horizon. Ships on the ocean or tall Chicago buildings viewed over Lake Michigan disappear bottom-first.

3. 地平線。從密歇根湖看海上航行的船或者是芝加哥大樓，它們都是先從底部消失

And you can see the sunset twice if you watch it lying down and then quickly stand up.

你也能夠看到兩次日落之景，如果你先躺下，然后迅速站起来

if the earth were flat, there wouldn't be a horizon beyond which things could disappear

如果地球是個平面，我們就不會看到 物體在地平面消失的場面

so you'd be able to see all of Chicago from across Lake Michigan… as well as the rocky mountains.

同时在密歇根湖的另一邊，你不僅能看到整個芝加哥，也能看到洛磯山脈。

2. During a lunar eclipse, the shadow of the earth on the moon is curved.

2. 在月食的過程中，地球投射在月球上的陰影是彎曲的。

And... 1. We know the earth is round because we have photographic evidence.

1. 我們之所以知道地球圓的是因為：我們有地球的照片

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