Friday Headlines, December 28, 2012
THE LATEST IN THE GEOSCIENCES
This volcano is the result of subduction of the Pacific Plate below the South American Plate.
On December 22, a plume of ash was noted in an image from the GOES satellite.
Since then, alerts have been issued and the volcano is clearly erupting.
Michael Morgan and David Carrier of the University of Utah have shown that the human hand is not only a dexterous appendage, capable of precision gripping, but is also an effective weapon, but only when it is balled into a fist. When the fist is formed, it causes all the forces of a hit to be transmitted through the knuckles – a small surface area – resulting in a focused transmission of the power of the blow, maximizing the potential damage. The human hand can clinch a fist where the curled fingers leave no gaps at the palm of the hand (which would weaken the blow), and where the thumb can further buttress the fingers. No other animal can do this.
You just have to go and look at this picture. It’s amazing!