Cavity two-thirds the size of Manhattan discovered under Antarctic glacier theguardian.com

Scientists have discovered a giant cavity at the bottom of a disintegrating glacier in Antarctica, sparking concerns that the ice sheet is melting more rapidly than expected. Researchers working as part of a Nasa-led study found the cavern, which they said was 300 metres tall and two-thirds the size of Manhattan, at the bottom of the massive Thwaites glacier. Build walls on seafloor to stop glaciers melting, scientists say