Colder than average temperatures in the stratosphere during 2011 caused a larger than average ozone hole above Antarctica, according to NASA and NOAA data.
The current phenomenon of Earth warming is unique from a historical, geological perspective since the end of the last Ice Age, says a Swedish researcher.
A forensic student reconstructs the head of a Stone Age youth known as Viste Boy. Archaeologists believe he lived in the Vistehola cave near Stavanger, Norway.
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