Ice javelins
Media playback is unsupported on your device

Science 'javelins' spear Antarctic

UK scientists have developed an air-dropped projectile to put instruments in some of the most inaccessible places in Antarctica.

Twenty-five of these "javelins" are currently sticking in Pine Island Glacier, one of the continent's biggest and fastest-moving ice streams, monitoring its movement.

Dr David Jones from the British Antarctic Survey described the design of javelins to our science correspondent Jonathan Amos.

Go to next video: Wind tunnel tests on 'ice javelins'