成人快手

Mount Sinabung, on the Indonesian island of Sumatra, has been erupting since September 2013. Last weekend at least 16 people, who had reportedly gone into red evacuation zones, were killed after pyroclastic surges flowed down the side of the volcano. David Rothery, professor of Geosciences at the Open University explains why these pyroclastic flows are so deadly.

Inside an Asteroid
The complexity of the inside of an asteroid has been revealed for the first time. Dr Stephen Lowry from the University of Kent says his work will help to explain what happens when collisions occur in the Solar System and provide clues on how planets form. He found that asteroids can have a highly varied internal structure.

Record Breaking Glacier
The Jacobshavn Glacier - widely thought to be the glacier that produced the iceberg that the Titanic hit - is now the fastest flowing glacier in the world. Professor Ian Joughin from the University of Washington, Seattle, measured summer speeds of more than four times what they were in the 1990's.

(Image: A schematic view of the strange peanut-shaped asteroid Itokawa. Courtesy of ESO Acknowledgement: JAXA)