Knowing that stardust, like iridium, is delivered to our planet in the form of cosmic dust, asteroids and comets, we decided to search for these exotic carbon molecules in earthly sediments.

• 我们知道星尘像铱一样会随著彗尘、小行星、彗星一起掉落地表后，就决定在地球沉积层中搜寻这些外来的碳分子。