Some physicists are pushing back against ideas like String Theory and the Multiverse. Here, we see a computer-generated image of a black hole, which might, ultimately, be explained by ideas like String Theory. Alain Riazuelo/IAP/UPMC/CNRS hide caption

itoggle caption Alain Riazuelo/IAP/UPMC/CNRS

13.7: Cosmos And Culture

The Most Dangerous Ideas In Science

There's a battle going on over the methods we can use to get answers for the biggest cosmic questions humans can ask. Astrophysicist Adam Frank explains why it's a contest over the future of science.

Arthur H. "Bud" Kelder, left, died in World War II. Courtesy of the Kelder family hide caption

itoggle caption Courtesy of the Kelder family

The Two-Way - News Blog

Family's Long Fight With Pentagon Returns Name To Unknown Soldier

The remains of Arthur "Bud" Kelder, a World War II soldier featured in an NPR/ProPublica investigation, have been identified by the Joint POW/MIA Accounting Command. The move comes after years spent in court.

Holocaust survivors walk outside the gate of the of the Auschwitz Nazi death camp in Oswiecim, Poland, on Tuesday. Some 300 Holocaust survivors traveled to Auschwitz for the 70th anniversary of the death camp's liberation by the Soviet Red Army in 1945. Alik Keplicz/AP hide caption

itoggle caption Alik Keplicz/AP

The Two-Way - News Blog

Holocaust Survivors Mark 70th Anniversary Of Auschwitz's Liberation

About 300 survivors of the Nazi camp are attending the ceremony with German and Austrian leaders. But attention is also on the absence of Russia's president, whose countrymen liberated Auschwitz.

A soldier from the Swedish army participates in a military exercise at Hagshult Airbase in Sweden in November 2014. Jonathan Nackstrand/AFP/Getty Images hide caption

itoggle caption Jonathan Nackstrand/AFP/Getty Images

Parallels - World News

Russian Threats Expose Europe's Military Weakness

A series of military confrontations and growing tensions between Western Europe and Russia mean armed conflict in Northern Europe seems plausible — and show how ill-prepared the region is now.

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