Why Is the Dark Side of the Moon So Different?
A Moment of Science

Why Is the Dark Side of the Moon So Different?

B2Upper-intermediateNovember 6, 20262 min
  • Science

Why Is the Dark Side of the Moon So Different?

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Sentence 5 of 12 · 0:28

While the near side is splotched with smooth, dark planes caused by ancient lava flows,

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Later missions revealed that the geochemical makeup

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B2

B2 · Upper-intermediate

Comfortable if you already follow TV news

A1 11%A2 57%B1 11%B2 21%C1 0%
  • 79% of the words are B1 or easier.
  • 164 words a minute: natural, fairly fast speech.
  • 15 harder words (B2 and up) in the whole episode.

Transcript

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0:00

There's something different about the dark side of the moon, and it's not just that we can't see it from the Earth. Ever since the first space missions gave us our first glimpses of the side of the moon that faces away from the Earth, we've known that it's physically different from the near side, the part that we can normally see. While the near side is splotched with smooth, dark planes caused by ancient lava flows,

0:28

The far side is pockmarked with craters. Later missions revealed that the geochemical makeup of the two sides was different too. We learned that unlike the far side,

0:38

the near side has a region where a strange combination of elements, including potassium, rare earth elements, phosphorus and thorium are concentrated. What we didn't know was what caused these differences

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