It was the warmest year on record and brought a series of extreme weather events, from wildfires and floods to drought and a devastating derecho. Polls show a big jump this year in the number of people connecting such disasters with climate change.
The year saw some disappointments in the development of drugs to treat Alzheimer's. But the setbacks were offset by progress in other areas. The upshot from this year's mixed results, some scientists say, is that treatment for Alzheimer's needs to start long before forgetfulness and muddled thinking are apparent.
When food passes its sell-by date, it's swept from the supermarket shelf. But that doesn't mean it's not safe to eat. Taste and smell are usually better indicators of a food's safety. And some items, like canned foods, can even last years or decades after their expiration date.
An IBM computer that analyzes flavor molecules and develops recipes is on the way in five years, scientists say. They are hoping to find not only novel and tasty flavor combinations, but ones that will appeal to us without adding to our waistlines.
The Keystone pipeline is supposed to carry tar sands oil from Canada to Texas — a route that runs right through David Daniel's land. To try to save his woods from bulldozers, Daniel built tree houses 80 feet in the air and protesters climbed up into them.
With billions of children to visit in just one night, how does Santa make it to every house? And how does he fit down the chimney — assuming your house has one. Astrophysicist Neil De Grasse Tyson talks to David Greene about the science of Santa.
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