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An original Ulfberht sword at the National Museum in Copenhagen, Denmark. The sword is dated from the 10th century and bears the inscription +VLFBERH+T. According to archeometallurgist Alan Williams' research, Ulfberht swords with the +T inscription were made from crucible steel, a pure kind of steel not known in Europe during the Viking Age.

Airs Wednesday, March 29, 2017 at 9 p.m. on KPBS TV

Students Demonstrate Robot They Designed In City Hall

High school students showed off their robot, Daisy Bell, at City Hall today. They will compete in the Sixth Annual FIRST Robotic Regional Championship, which is held annually in San Diego.

Back To School For San Diego Students

Schools will go through lots of big changes this year, but on the first day of class, San Diego students were thinking about seeing their friends.

Tyrone Ingram, Jessica Rogers, Charissa Joy Los, Scott Los, Wendi Los. Rose Thompson, and genealogist Kenyatta Berry during taping of GENEALOGY ROADSHOW in Detroit, Mich.

GENEALOGY ROADSHOW: Detroit

Airs Monday, September 30, 2013 at 9 p.m. on KPBS TV

Supporters of Republican Sen.-elect Tom Cotton celebrate his win in Arkansas over incumbent Mark Pryor. The GOP picked up seven seats Tuesday, gaining control of the Senate.

GOP Takes Control Of Senate With Wins in N.C., Iowa, Ark., Colo.

Republicans needed to pick up just six seats in Tuesday's midterm elections to wrest control of the Senate. In the House, the key question was how big the GOP majority would be next year.

Senate Minority Leader Mitch McConnell, R-Ky., casts his ballot in the midterm election at the voting precinct at Bellarmine University in Louisville on Tuesday. The five-term incumbent is hoping to become majority leader if his Republicans can gain six seats in the Senate.

McConnell Wins Re-election, Awaits Results for Senate Majority

Republicans need to pick up just six seats in today's midterm elections to wrest control of the Senate. In the House, the key question is how big the GOP gains will be.

Several federal agencies are translocating juvenile humpback chub to ensure the endangered fish's survival.

Feds Fly Endangered Fish To Safety

The Grand Canyon National Park and other federal agencies are going to great lengths to save a homely fish in the Colorado River Basin. The latest: translocation, which involves several trucks, helicopters and biologists.

WHO Calls For High-Priced Drugs For Millions With Hepatitis C

About 150 million people worldwide have hepatitis C, and all should be assessed and treated, the World Health Organization says. The cost of screening and drugs means that won't happen soon.

University of California Will Lose Research Grants With Sequestration

The University of California could lose hundreds of millions of dollars in research grants if automatic federal budget cuts occur through sequestration.

Public school student Julio Valenzuela, 11, grimaces as he gets a vaccination before the start of the school in Lynnwood.

How A California Law To Encourage Vaccination Could Backfire

California has a new law that's supposed to get more of the state's children vaccinated against measles, whooping cough and other infectious diseases.

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