Iran issued a threat to a U.S. aircraft carier, today, which further complicates the tense relationship between the two countries. The threat comes just a day after Iran performed naval maneuvers in the Strait of Hormuz.
Make a list of the world's most popular scientists, and Stephen Hawking's name will be near or at the very top of the list.
Hawking, the author of A Brief History of Time and a professor at the University of Cambridge, is known as much for his contributions to theoretical cosmology and quantum gravity as for his willingness to make science accessible for the general public, says science writer Kitty Ferguson.
"It's not dumbing down [science]; it's really making it accessible, hopefully, to a lot of people," she tells Fresh Air's Terry Gross.
Republican presidential candidates prepared Tuesday for their first major test of the primary season, making last-minute whistle-stops throughout Iowa in hopes of swaying many undecided caucus-goers.
Later tonight, Iowa Republicans will gather to cast ballots for the person they want to stand against President Obama in November. But after a bruising months-long campaign, more than a third of those participating in the caucuses say they still haven't made up their minds.
More than half of American public schools don't have a full-time nurse, and the situation is getting worse as school systems further cut budgets. This year, 51 were laid off in Philadelphia's public schools, 20 in a Houston suburb, 15 in San Diego and dozens more in other school systems nationwide.
Other schools have reduced their school nurse staffing.
A federal report possibly linking groundwater pollution to hydraulic fracturing in central Wyoming is not discouraging hopes for the Niobrara oil play in the southeast part of the state.
Many are questioning the scientific conclusions of the Environmental Protection Agency findings on the technique to extract oil and gas.
But both EPA and industry representatives say the specific concerns raised in the report are not applicable to southeast Wyoming. That is because the Niobrara formation is geologically much different than the Pavillion area.
The Wyoming Democratic Party has chosen a new executive director: Robin Van Ausdall.
Van Ausdall has worked on several Democratic political campaigns in Colorado and was the Democratic National Committee field officer for northeast Colorado for three years.
She says she’s excited about returning to her native Wyoming, and she hopes to make the Democratic party more competitive in the state. She says she hopes to provide more support to party officials at the county level and to raise more money than in the past.
After months of campaigning, it's finally caucus day in Iowa. Polls still show a fluid race, with former Massachusetts Gov. Mitt Romney, Texas Rep. Ron Paul and former Pennsylvania Sen. Rick Santorum heading the pack.