Speed Reading — Dinosaurs - Level 4 — 300 wpm

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Scientists have more details of how the dinosaurs died out 65 million years ago. The scientists analyzed rocks in a crater under the seabed off Mexico. The rocks were created from the disastrous impact of a huge asteroid hitting Earth. The rocks' layers show a step-by-step account of what happened after the impact. A scientist said: "It tells us what went on inside the crater on that day of doom that killed the dinosaurs. All of this...is recorded in the [rock]."

The asteroid was up to four kilometers wide. It created a crater 160kms wide and 20kms deep. This started a chain reaction of earthquakes, tsunami, landslides and fires that changed Earth's geology forever. It also killed off the dinosaurs. Molten rock fell into the crater, which was then filled with ocean water. This water was full of soil, vegetation and other debris. It took a few hours to settle in the layers scientists are now analyzing millions of years later.

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