Which of the following is least reasonable regarding the extinction of the dinosaurs? Group of answer choices Scientists originally believed that the Chicxulub crater was caused by a nuclear blast since the impact residue (e.g., melted bedrock, tektites, shocked quartz, etc.) discovered there was very similar to that found around nuclear test sites. According to a well-established hypothesis, a meteor the size of a mountain slammed into Earth about 65 million years ago, filling the atmosphere with gas, dust, and debris that drastically altered the climate. One key piece of evidence is a very high level of iridium in a layer of Earth, with lots of dinosaur fossils below but none above. A huge impact crater linked to the impact event was found around coast of Mexico’s Yucatán Peninsula. Although the impact occurred in the Gulf of Mexico, meteorite debris from the 'dinosaur rock' was discovered all over the world.

Question

Which of the following is least reasonable regarding the extinction of the dinosaurs?

Group of answer choices

Scientists originally believed that the Chicxulub crater was caused by a nuclear blast since the impact residue (e.g., melted bedrock, tektites, shocked quartz, etc.) discovered there was very similar to that found around nuclear test sites.

According to a well-established hypothesis, a meteor the size of a mountain slammed into Earth about 65 million years ago, filling the atmosphere with gas, dust, and debris that drastically altered the climate.

One key piece of evidence is a very high level of iridium in a layer of Earth, with lots of dinosaur fossils below but none above.

A huge impact crater linked to the impact event was found around coast of Mexico’s Yucatán Peninsula.

Although the impact occurred in the Gulf of Mexico, meteorite debris from the 'dinosaur rock' was discovered all over the world.