Advanced degrees can provide added job security

Nothing like a recession and weak recovery to focus workers on a key question: What can I do to stay employed? The answer for many: get an advanced degree.

john tlumacki/globe staff

President of Ireland makes first visit to Boston

Michael D. Higgins visited several sites in Boston Saturday as part of the annual remembrance of the Great Irish Famine.

Springfield residents rally for man convicted of murder

About 50 people, including a relative of the victim, rallied Saturday in Gerrish Park for Charles Wilhite, who they said was wrongfully convicted of murder in 2010.

Obama rips into Mitt Romney at Ohio rally

At his first official campaign rally of the year, President Obama tore into Romney as eager to ‘‘rubber stamp’’ a conservative Republican congressional agenda.

Exclusive Sunday Preview

A sampling of stories from this Sunday's Globe.

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opinion | JOANNA WEISS

Big drama and bigger egos in Edwards’ court

Whether former presidential hopeful John Edwards is guilty of misusing campaign funds is the least interesting thing about the show playing out in federal court.

bibliophiles

Paul Krugman: Economist and sci-fi buff

From the bully pulpit of his New York Times column, Paul Krugman has been explaining why numbers matters since 1999.

ideas

What happens when you change an entire health care system?

MIT economist Amy Finkelstein, recent winner of the John Bates Clark Medal, goes beyond the political debate to look at the real economic consequences of changes in health care policy.

Critic’s Notebook

Struggling with the diversity challenge on TV

In this moment where discussions of the representations of race on TV and racial flare-ups in the real world seem to be bubbling up all over, Sarah Rodman highlights shows that deftly make “visibility” invisible.

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Globe Talk | May 23, 6 p.m.

A conversation with Ben Mezrich

The New York Times best-selling author discusses his novels “Bringing Down the House” and “The Social Network.”

BostonGlobe.com exclusives

Bryn Terfel in “Das Rheingold” at the Metropolitan Opera, which has been rolling out “Ring” productions over the last two seasons.

Arts | third ear

The Met’s digital Valhalla

Acadia National Park: A peaceful dawn breaks at Monument Cove.

Travel

Classic spring landscapes that await your camera

The Word

Dude, this headline is so meta

Reports link Law to crackdown on nuns

Former Secretary of State Colin L. Powell received an honorary degree and gave the commencement address.

Powell tells NU graduates world needs them

Chen Guangcheng (left) spoke with US ambassador to China Gary Locke as they left the embassy for a hospital in Beijing on May 2, 2012.

Dissident’s saga watched by Bostonians

Menino plays hard to get in Senate race

Harvard University student Brenna Hilferty watches TV with her “buddy,” Edith Sarah, 91, at the Hebrew SeniorLife center in Roslindale.

Alzheimer’s buddies program has special meaning

A soldier stood guard in front of the Unha-3 rocket at the West Sea Satellite Launch Site in North Korea in April. The launch failed.

Exclusive Sunday Preview | Ideas

The Asian space race arrives

Elizabeth Warren stands with one of her three brothers and her parents in 1955.

Opinion | DANTE RAMOS

Are you ‘diverse’?

Kendric Price worked with (from left) Knyzhaun Peete, Christian Clark, Lewis Bryant, and Divine Braxton-Price.

Price honors friend with youth program

A view of Toronto’s waterfront, including the St. Lawrence Market building (foreground).

exclusive sunday preview | travel

Toronto’s history captivates visitors

Sports

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138th kentucky derby

Jockey Mario Gutierrez, riding in his first Derby, guided the 3-year-old I’ll Have Another to victory on a fast track.

I’ll Have Another wins Kentucky Derby

I’ll Have Another caught Bodemeister down the stretch and pulled away on Saturday to win in Louisville.

Metro

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Some residents who oppose a new Walmart in Watertown have expressed concerns about increased traffic, noise and sound pollution, property devaluation, and threats to small business owners.

Dozens protest proposed Wal-Mart in Watertown

The protestors demonstrated their opposition to the possible construction of a superstore on a 7.8 acre property located at Irving and Arsenal streets.