UPDATED: 4:50 p.m. Looking for a little weekend reading? The Food and Drug Administration has just the thing. On Friday, the agency released two proposed rules designed to boost the safety of the nation's food supply, encompassing hundreds of pages.
In 2012 the Higgs boson was spotted at CERN, private company SpaceX began supply flights to the International Space Station, and the world bade farewell to the Galapagos tortoise Lonesome George. A panel of journalists discusses the year's top stories in science.
Cold-water fish, snow-dwelling bugs and some grasses have evolved natural antifreeze proteins to avoid turning to ice cubes. Peter Davies, a biologist at Queen's University in Ontario, discusses how these antifreeze substances work, and their applications for human problems--like keeping the ice out of ice cream.
In Full Planet, Empty Plates: The New Geopolitics of Food Scarcity, Lester Brown says the world's food supply is tightening, and the reasons are many. People in developing countries are eating more meat, a grain-intensive food; farmers are overpumping, causing water tables to fall; and crop yields have plateaued, despite technological advances.
The comet ISON, discovered by two amateur astronomers last year, will zoom past the Earth next fall. But where did it come from? Astronomer Andrew Fraknoi says a passing star could have flung the comet our way from the Oort Cloud, a distant realm of ice chunks at the outer limits of the solar system.
That's right in line with economists' expectations and is another sign of steady, though modest, growth in employment. In November, employers added an estimated 161,000 jobs. The average monthly gain in 2012 was 153,000 jobs, BLS says. That's the same average as in 2011.
Children often show signs of trauma from their experiences inside Syria. A U.N. team interviewing Syrian children in a refugee camp found that most lost a loved one in the fighting, and almost half have post-traumatic stress disorder.