Last Updated: Tuesday, February 28, 2012, 13:22
Shrinking arctic ice could be triggering widespread cold outbreaks in the Northern Hemisphere in recent years.
Last Updated: Thursday, December 22, 2011, 12:46
The official onset of winter and the beginning of the end for long, dark nights in the northern hemisphere is marked by the winter solstice.
Last Updated: Saturday, December 17, 2011, 17:43
Scientists claim to have found evidence that nitrogen from human activity has been polluting lakes in the northern hemisphere since the late 19th century.
Last Updated: Friday, August 19, 2011, 09:12
Animals across the world are fleeing global warming by heading north much faster than they were less than a decade ago, a new study says.
Last Updated: Wednesday, August 10, 2011, 16:45
The Perseid meteor showers, an annual display of shooting stars in Northern Hemisphere, are underway with an expected peak on Friday, but a full moon will hamper seeing all but the brightest meteors.
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