Alva Review-Courier -

WASHINGTON (AP) — The giant space rock that wiped out the dinosaurs may have set off a chain of cataclysmic volcanic eruptions on land and undersea, claims a new study that is already dividing scientists.

About 66 million years ago a 6-mile wide asteroid smacked into Earth, creating the Chicxulub crater in the Yucatan and sparking deadly chaos. Superhot particles rained from the air causing fires across the globe and sending temperatures higher. Then it got worse. Clouds of particles reflected the sun's energy away, darkening the skies and cooling Earth at least 45 degrees (25 degrees Celsius)...