NASA | Greenland's Mega Canyon

Scientists have discovered a massive canyon beneath Greenland's ice sheet using ice-penetrating radar. The canyon, over 400 miles long and up to half a mile deep, predates the ice sheet. It was found by a team led by the University of Bristol, using data from UK and German airborne campaigns and NASA's Operation Ice Bridge. The canyon extends from Greenland's interior to the Petermann Glacier and may play a crucial role in transporting meltwater to the Arctic Ocean.

What technology did scientists use to discover the canyon beneath Greenland's ice?

• Satellite imagery

• Thermal imaging

• Ice-penetrating radar

• Seismic waves

Which university led the team that discovered the hidden canyon in Greenland?

• University of Oxford

• University of Cambridge

• University of Edinburgh

• University of Bristol

What is the purpose of NASA's Operation Ice Bridge?

• To monitor changes in the Greenland ice sheet

• To explore the ocean floor

• To map the surface of Mars

• To study atmospheric conditions

Where does the canyon extend to on Greenland's northern coast?

• Jakobshavn Glacier

• Helheim Glacier

• Kangerlussuaq Glacier

• Petermann Glacier

What role do researchers believe the canyon plays in Greenland?

• It provides a route for human exploration

• It transports meltwater into the Arctic Ocean

• It acts as a barrier to ice flow

• It supports local wildlife habitats