Aurora over Maine
It has been a good week for auroras. Earlier this month active sunspot region 2158 rotated into view and unleashed a series of flares and plasma ejections into the Solar System during its journey across the Sun’s disk. In particular, a pair of Coronal Mass Ejections (CMEs) impacted the Earth’s magnetosphere toward the end of last week, creating the most intense geomagnetic storm so far this year. Although power outages were feared by some, the most dramatic effects of these impacting plasma clouds were auroras seen as far south as Wisconsin, USA. In the featured image taken last Friday night, rays and sheets of multicolored auroras were captured over Acadia National Park, in Maine, USA. Since another CME plasma cloud is currently approaching the Earth, tonight offers another good chance to see an impressive auroral display.
Image credit & copyright: Jeremy P. Gray
Shatner, when asked, ‘What do you think about this trend in fandom, where Kirk and Spock are more than friends?’ Shatner looked at the interviewer, laughed and said, ‘Well, they’re gay, what do you think?’
August 18th, 2014 monsoon in Tucson, Arizona
Meteorite Doomed Dinos, Altered Forests
The meteorite impact that spelled doom for the dinosaurs 66 million years ago decimated the evergreens among the flowering plants to a much greater extent than their deciduous peers, according to a study led by Univ. of Arizona researchers. The results are published in the journal PLOS Biology.
Applying biomechanical formulas to a treasure trove of thousands of fossilized leaves of angiosperms — flowering plants excluding conifers — the team was able to reconstruct the ecology of a diverse plant community thriving during a 2.2 million-year period spanning the cataclysmic impact event, believed to have wiped out more than half of plant species living at the time.
The researchers found evidence that, after the event, fast-growing, deciduous angiosperms had replaced their slow-growing, evergreen peers to a large extent. Living examples of evergreen angiosperms, such as holly and ivy, tend to prefer shade, don’t grow very fast and sport dark-colored leaves.
Read more: http://www.laboratoryequipment.com/news/2014/09/meteorite-doomed-dinos-altered-forests