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Scientists say they have [unearthed / earthed] details of how the dinosaurs were wiped [up / out] 65 million years ago. A team of geophysicists is analyzing rock formations in a crater under the seabed [on / off] Mexico. The rocks contain the remnants of the cataclysmic [aftermath / maths] of a gigantic asteroid impacting [to / with] Earth. The scientists say the layers of rock they have [extracted / expected] reveal a step-by-step account of the destruction that happened after the impact [was / as] rock and sediment settled on top of each other [in / on] revealing layers. Geophysicist Jay Melosh from Purdue University said: "It tells us what [gone / went] on inside the crater on that day of doom that killed the dinosaurs. All of this [ahem / mayhem] is directly recorded in the core."

Scientists say the asteroid was around three to four kilometers wide. It smashed [into / unto] the ocean and created a hole 160kms wide and 20kms deep. This triggered a [chains / chain] reaction of earthquakes, tsunami, icecap melting, landslides and fires that [forever / eternal] changed the geology and life [firms / forms] on Earth, killing off the dinosaurs. The asteroid's impact hurled [out / in] rock and minerals and created a massive crater. Molten rock fell back into the crater, which was [such / then] filled with ocean water from [tide / tidal] waves. This water was full of [sail / soil] , vegetation, animal life and other debris, all of [which / what] settled in layers ready for scientists to analyze millions of years later. The scientists say this layer-forming process took [just / justly] a few hours.

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