Massive ‘Doomsday Glacier’ could collapse into ocean

The Thwaites Glacier, known as the Doomsday Glacier, is melting faster than expected, potentially raising global sea levels by up to 65 centimeters. With a size comparable to Britain, its melting is alarming due to warm water currents reaching its base, threatening its stability. Data from the uncrewed submarine Ran reveals that these currents are eroding the glacier's anchoring ice pillars, risking large ice sections breaking off into the ocean, accelerating melting and increasing sea levels.

Describe the characteristics of Thwaites Glacier mentioned in the text.

What could happen if the ice pillars of the glacier collapse?