Plant life on our planet soaks up a fair amount of the carbon dioxide that pours out of our tailpipes and smokestacks. Plants take it up during the summer and return some of it to the air in the winter. And a new study shows that those "breaths" have gotten deeper over the past 50 years.
This isn't just a curiosity. Plant life is helping to reduce the speed at which carbon dioxide is building up in our atmosphere. That's slowing the global warming, at least marginally, so scientists are eager to understand how this process works. The new study provides some clues.
Originally published on Thu August 8, 2013 3:54 pm
A U.S. radar system that tracks thousands of objects orbiting Earth — from satellites to harmful debris — has been slated for shutdown, according to the Space News site. The ground-based network known as the "Space Fence" may cease to operate in October.
Originally published on Thu August 8, 2013 2:05 pm
Our nearest star is about to pull a once-in-11-years move by swapping its north and south magnetic poles.
The sun's polarity switch is a natural part of "solar max" — the period of peak activity during what averages out to be roughly an 11-year cycle. According to NASA, this year will mark the fourth time since 1976 that scientists have observed the 180-degree pole flip.
Originally published on Thu August 8, 2013 9:56 am
Who do these guys think they are, the Dr. Frankensteins of virology?
First, two teams of virologists created more dangerous versions of the deadly H5N1 flu. Now they want to give the H7N9 virus, which has already sickened at least 134 people and killed 43 people in Asia, a few new capabilities: drug resistance, faster transmission between people and the ability to sneak past the immune system.
Originally published on Thu August 8, 2013 9:50 am
"The National Security Agency is searching the contents of vast amounts of Americans' e-mail and text communications into and out of the country, hunting for people who mention information about foreigners under surveillance, according to intelligence officials," The New York Times reported Thursday.
Originally published on Thu August 8, 2013 9:01 am
Imagine a friend of a friend brings his family to stay with you — his family of tiny survivalists. For weeks or months you all live quietly side by side with no problems. You share meals. Your kids play together.
Then one day you get sick — maybe felled by a bad cold or the flu. Suddenly certain the end is near, your jittery houseguest breaks out an armory's worth of chemical weapons. He abandons his community to save himself and hunt for a new home, wreaking havoc on the way out the door.