Saul Perlmutter shared the 2011 Nobel Prize in physics for his discovery that the universe was expanding at an accelerating rate. Perlmutter explains how supernovae and other astronomical artifacts are used to measure the expansion rate, and explains what physicists are learning about "dark energy" — the mysterious entity thought to be driving the acceleration.
What would it be like to be a string that made music? Not anything simple, like a guitar string or a cello string, but a magical string, a sine curve that's taut then loose, that doubles then doubles again, that sheds then dissolves into showers of notes — a flaming, sighing, looping, dissolving string. Curious?
Taxpayers help subsidize crop insurance premiums for farmers to the tune of about $9 billion dollars, a figure that's growing each year. These policies protect farmers from major losses, and help support their income even if there's no loss of crops.
And in return? Well, environmentalists argue that farmers who receive this financial supportshould be required to be good stewards of the land.
In 1961, Mel Brooks and Carl Reiner came up with some basic theories of caveman linguistics in their 2,000-Year-Old Man skit. Most of them had to do with rocks, as in, "What are you doing with that rock there?"
Now, a professor in England has questioned the validity of the famous caveman's rock-centric theories. And Mark Pagel of the University of Reading is reaching even further back, to the time of the 15,000-year-old man.
A study of genetically identical mice is providing some hints about humans. How can one identical twin be a wallflower while the other is the life of the party?
The study of 40 young mice found that their behavior grew increasingly different over three months, even though the mice shared the same genes and lived in the same five-level cage, researchers report Thursday in the journal Science.
Between the ages of 36 and 38, Sarah Elizabeth Richards spent $50,000 to have her eggs frozen. That wiped out her savings and the money her parents had set aside for a wedding, and she writes, it was the best investment I ever made. Improved technology gives women the choice to freeze their eggs when they're younger and schedule motherhood when they're ready. The experimental status of this procedure was lifted last year.