Mars rover finds ‘jelly doughnut rock’

Before and after photos taken by the Opportunity rover. (AP)

The mysterious pastry-sized rock is unlike anything scientists have ever seen before on Mars.

More National News

Kissinger: The gift that keeps on giving

Kissinger: The gift that keeps on giving

Former Secretary of State Henry Kissinger prepared to ship Nobel Peace Prize for 1973 Vietnam peace accord back to Norway, but the Norwegians wouldn’t accept it.

Competing appeals over upcoming postal-rate hike

Competing appeals over upcoming postal-rate hike

fedpagehero; Mailers, postal service appeal three-cent rate increase set to take effect Monday

McConnell’s campaign ad earns a Geppetto

McConnell’s campaign ad earns a Geppetto

We examine how much Sen. Mitch McConnell (R-Ky.) did to help workers after a Post series appeared.

How states spend their cash, in 5 maps

How states spend their cash, in 5 maps

For the third time in the last four years, states spent more than they brought in.

The latest bad fad in higher education

Enrolling low-income students should not become some kind of selective higher education “Hunger Games.“

Former top Obama administration aides join private sector

Peter Rouse and Mark Patterson to set up Perkins Coie’s new public and strategic affairs practice.

McDonnell nixed deal to avoid trial, spare wife

McDonnell nixed deal to avoid trial, spare wife

Ex-governor’s wife had told prosecutors she felt responsible for link to wealthy businessman.

Christie campaign subpoenaed for documents

A federal prosecutor also seeks documents from the New Jersey Republican State Committee.

Days after the snow, school delays in D.C. area continue

School officials cite safety concerns following this week’s snowstorm.

Conservative author charged in campaign finance case

Indictment says Dinesh D’Souza illegally reimbursed associates for contributions to an unnamed Senate campaign in 2012.

Obama says NSA phone program is not illegal

Obama says NSA phone program is not illegal

The president cites federal court rulings that upheld the program’s constitutionality.

Iraqi leader says Sunnis see opportunity in Anbar crisis

The parliament speaker says Sunnis hope their help against militants will bring them political benefits.

Rise in prepaid debit cards entices banks to sponsor them

Rise in prepaid debit cards entices banks to sponsor them

The lucrative business comes with risks, analysts warn.

OPM plans to trim 356 employees in March

Budget constraints and a slowdown in federal hiring and training prompted the decision.

Column

Federal senior executives growing weary

Senior Executive Service members face “growing weariness, circumspection, caution and fear.”

White House health reform coordinator resigns

White House health reform coordinator resigns

Chris Jennings leaves after six months, citing personal health concerns.

Little-known aspect of Medicaid causing fear

In some cases, state can seize deceased person’s assets to recoup costs, but experts say it’s unlikely.

D.C. schools bus-contract dispute quashes student ski trip

Dozens of D.C. students expecting a long-awaited ski trip to Pennsylvania were left out in the cold.

In the Loop: Another window on Kissinger back in the day

In the Loop: Another window on Kissinger back in the day

Telephone transcripts being released; Kissinger wanted conversations held until five years after his death.

D.C. school system forms task force to study student testing

D.C. school system forms task force to study student testing

Chancellor Kaya Henderson wants to “put testing in the proper perspective” after years of complaints.

Column

It doesn’t pay to be optimistic: Ally shares disappoint

It doesn’t pay to be optimistic: Ally shares disappoint

Taxpayers won’t get as much payoff for bailing out troubled auto lender, but it was still worth doing

Let’s stop whining about school snow closures

Let’s stop whining about school snow closures

Fairfax unfairly gets slammed for closing schools.

Moody’s downgrades outlook for health insurers

The credit-rating firm highlighted the risks of selling plans on the health-insurance exchanges.

Snowden denies stealing passwords to access secret files

Snowden denies stealing passwords to access secret files

In online question-and-answer session, he says U.S. law precludes him from returning home.

GOP to tighten presidential nominating rules

GOP to tighten presidential nominating rules

The Republican National Committee will compress its presidential nominating contest.

Hagel orders full review of nuclear force

Hagel orders full review of nuclear force

The defense secretary’s move follows a string of embarrassing revelations about personnel on the force.

5 things to know about SOTU responder Cathy McMorris Rodgers

5 things to know about SOTU responder Cathy McMorris Rodgers

She’s the only member to give birth three times while serving in Congress.

Mars rover finds ‘jelly doughnut rock’

Mars rover finds ‘jelly doughnut rock’

The mysterious pastry-sized rock is unlike anything scientists have ever seen before on Mars.

Education stats -- state by state

In a handy infographic.

Video

First lady eats at a D.C. Subway

First lady eats at a D.C. Subway

Michelle Obama eats lunch with students and star athlete Michael Phelps at a Subway in the District.

What two magazine covers can tell us about Clinton ‘16

What two magazine covers can tell us about Clinton ‘16

How Hillary will be covered matters. A lot.

So you want to buy a lawmaker? Here’s how much that’ll cost.

Post TV takes a look at notable bribery schemes in politics -- and how much it took for lawmakers to sell out.

Michelle Obama touts Subway’s kids menu

Michelle Obama touts Subway’s kids menu

Subway is the latest food company to join the first lady’s healthy eating initiative.

How repressing the Brotherhood could have unintended consequences in Egypt

How repressing the Brotherhood could have unintended consequences in Egypt

The military-led government’s choice to repress the Muslim Brotherhood could actually boost support in the country for Islamism.

Ten things that aren’t panaceas

Ten things that aren’t panaceas

Whoever it is that keeps insisting that their preferred policies are panaceas has a lot of explaining to do.

Fairfax School District responds to criticism of snow cancellation

School spokesman John Torre said student safety is “primary concern.”

The polar vortex explained in 2 minutes

A quick science lesson from President Obama’s science advisor.

Zawahiri seeks to end infighting among Syrian militants

Zawahiri seeks to end infighting among Syrian militants

The al-Qaeda leader’s appeal reflects concern that battles are undermining the group’s ambitions in the region.

Leadership scholar named new dean of Harvard College

Leadership scholar named new dean of Harvard College

Rakesh Khurana will become the first faculty member with an appointment at the business school to take on the role.