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  • Now there are two rocks, right there

  • I got to put this one in your bag before I can get it

  • Ok

  • These have been described as...

  • ...the most expensive rocks in the world

  • Until NASA's Apollo moon missions...

  • ...they'd laid on the lunar surface for millions of years...

  • ...undisturbed by humans

  • Coming off this rock here, but it looks like caliche

  • From 1969 to 1972

  • The Eagle has landed

  • There were six Apollo missions...

  • ...which returned to Earth with samples

  • It was hoped they'd uncover secrets about the Moon...

  • ...they ended up teaching scientists a lot about the Earth too

  • Nine containers of lunar samples were brought back to Earth

  • Scientists studying the rocks...

  • ...learnt a great deal about the many impacts...

  • ...early in the Moon's development

  • These created huge craters...

  • ...some the size of large countries

  • Ancient volcanic eruptions then filled some of these basins...

  • ...with vast plains of lava...

  • ...creating the dry seas...

  • ...that can be seen by humans on Earth...

  • ...billions of years later

  • But the moon rocks also revealed...

  • ...the biggest impact...

  • ...was the one that created the Moon itself

  • Scientists found the Moon rocks to be surprisingly...

  • ...perhaps disappointingly, like those on Earth

  • It turns out that the Earth and the Moon...

  • ...are chemically very similar indeed, as if twins

  • It was this revelation that led to a game-changing idea...

  • ...the giant impact theory

  • The latest version of this theory...

  • ...involves the new idea of a synestia

  • In this theory...

  • ...the impact fills nearby space with a doughnut of hot vapour

  • Both the Moon and Earth are formed...

  • ...from the magma rain that resulted

  • The gravitational pull...

  • ...which binds the Moon and Earth to each other...

  • ...became the main cause...

  • ...of the rise and fall of the Earth's ocean tides

  • Scientists believe these tides could have been crucial...

  • ...for the evolution of animal life on Earth...

  • ...by offering a route from under the sea to above it

  • For almost 50 years...

  • ...no human has returned to the Moon

  • Now missions are being planned to its unexplored territories

  • Just as the United States was the first nation to reach the Moon...

  • ...in the 20th century...

  • ...so too will we be the first nation to return astronauts...

  • ...to the Moon in the 21st century

  • The hope of the next generation of scientists...

  • ...is that by studying new samples of rock...

  • ...they can unlock many more of the Moon's secrets...

  • ...and even some of the Earth's

Now there are two rocks, right there

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B1 US moon earth theory apollo lunar impact

What do Moon rocks reveal about the universe? | The Economist

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    Courtney Shih posted on 2020/01/20
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