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A giant asteroid struck Earth and wiped out the dinosaurs 65 million years ago. Mark Garlick/Science Photo Library via Getty Images

An asteroid impact could wipe out an entire city – a space security expert explains NASA’s plans to prevent a potential catastrophe

NASA has only mapped 40% of the potentially dangerous asteroids that could crash into Earth. New projects will boost that number, and upcoming missions will test tech that could prevent collisions.
High-density housing became popular as the population of Silicon Valley exploded, making affordable housing scarce. Bob Sacha/Corbis Documentary via Getty Images

Affordable housing – in pandemic times, what works and what doesn’t?

Housing affordability has been an important public policy issue since the onset of the pandemic. Economist Emily Hamilton explains the research on some popular affordable housing policies.
Russians in Moscow and elsewhere flocked to ATMs to withdraw cash, fearful that the ruble will plunge further due to Western sanctions. AP Photo/Victor Berzkin

US-EU sanctions will pummel the Russian economy – two experts explain why they are likely to stick and sting

By working with allies, the Biden administration has been able to place severe sanctions on Russia – including targeting Putin’s inner circle and banning banks from SWIFT.
Soldiers with the 92nd Mechanized Brigade of the Ukrainian Armed Forces conduct drills in northeastern Ukraine on Jan. 31, 2022. Vyacheslav Madiyevskyy/ Ukrinform/Future Publishing via Getty Images)

A new Cold War emerging as Russia launches full-scale invasion of Ukraine

The days of Soviet bloc countries in Eastern Europe disappeared at the end of the Cold War nearly 30 years ago. It appears Russian President Vladimir Putin wants to start a new Cold War..
A woman and child walk away from a damaged residential building in Kyiv, Ukraine, where a military shell allegedly hit on Feb. 25, 2022. Photo by DANIEL LEAL/AFP via Getty Images

Putin’s claims that Ukraine is committing genocide are baseless, but not unprecedented

Vladimir Putin has justified his invasion of Ukraine with baseless claims that Ukraine is committing genocide. It isn’t the first time a political leader has cried genocide for political means.
Ketanji Brown Jackson at her Senate Judiciary Committee hearing as a nominee to be a U.S. Circuit Judge for the District of Columbia Circuit, on April 28, 2021. Tom Williams-Pool/Getty Images)

Biden nominates Ketanji Brown Jackson to the Supreme Court: 7 questions answered

A constitutional law professor provides insight on what Judge Ketanji Brown Jackson, the first Black woman nominated to the Supreme Court, could mean for how that court works.
The relationship between public health and faith is far older than the COVID-19 pandemic. Fred de Noyelle/Godong/Universal Images Group via Getty Images

Can churches be protectors of public health?

Responses to COVID-19 health guidelines have been polarized, including in churches. But religious communities have a long history of involvement in public health.
The International Space Station is run collectively by the U.S., Russia, the European Space Agency, Japan and Canada. NASA Marshall Spaceflight Center/Flickr

Russian invasion of Ukraine and resulting US sanctions threaten the future of the International Space Station

What happens to the International Space Station when tensions on Earth rise? A space policy expert explains how the ISS is run and how Russian aggression has threatened its operation in the past – and now.
Researchers are working to develop vaccines that provide long-term immune protection from COVID-19. Marko Geber/Digital Vision via Getty Images

How long does protective immunity against COVID-19 last after infection or vaccination? Two immunologists explain

Because COVID-19 is a relatively new virus, researchers still aren’t sure exactly how long vaccines and prior infections provide protection.