News tagged with northern hemisphere

Why does Sirius twinkle?

At this time of year, after dark we in the northern hemisphere are able to see the mighty constellation of Orion rise high in the sky with a very bright companion in a nearby constellation: Sirius – The ...

Jan 17, 2012 5 / 5 (5) 10

2012: Shadow of the Dark Rift

(PhysOrg.com) -- One of the most bizarre theories about 2012 has built up with very little attention to facts. This idea holds that a cosmic alignment of the sun, Earth, the center of our galaxy -- or perhaps ...

Dec 22, 2011 4.7 / 5 (15) 32 | with audio podcast

Simultaneous ice melt in Antarctic and Arctic

The end of the last ice age and the processes that led to the melting of the northern and southern ice sheets supply basic information on changes in our climate. Although the maximum size of the ice sheet in the northern ...

Dec 02, 2011 4.4 / 5 (8) 3

Scientists tackle the carbon conundrum

U.S. scientists have developed a new, integrated, ten-year science plan to better understand the details of Earth's carbon cycle and people's role in it. Understanding the carbon cycle is central for mitigating climate change ...

Nov 16, 2011 5 / 5 (2) 26