Massive Crater Discovered Under Greenland Ice

Scientists discovered the Hiawatha impact crater beneath Greenland's ice, using radar and maps. The crater, one of the largest on Earth, is geologically young and may have formed less than 3 million years ago. Fieldwork confirmed the impact theory, finding shocked quartz grains. The crater's discovery is crucial for understanding Earth's history and assessing future impact risks.

What is the approximate size of the impact crater discovered beneath Greenland's ice sheet?

• 31 kilometers wide

• 10 kilometers wide

• 15 kilometers wide

• 50 kilometers wide

Which institution played a key role in the initial discovery of the crater?

• Smithsonian Institution

• Natural History Museum in Copenhagen

• American Museum of Natural History

• British Museum

What technology was crucial in confirming the presence of the crater beneath the ice?

• Thermal imaging

• Seismic activity sensors

• Ice-penetrating radar

• Satellite imagery

How old is the Hiawatha Crater estimated to be?

• More than 20 million years

• Over 10 million years

• Less than 3 million years

• Around 5 million years

What significant event might have coincided with the formation of the Hiawatha Crater?

• The rise of mammals

• The extinction of dinosaurs

• The formation of the Himalayas

• The last Ice Age