NPR Staff

Our global health team has just finished up a series called "What Causes Pandemics? We Do." In radio and online stories, we looked at the causes behind our new hyperinfectious era. We'll continue covering this topic in future stories, but we thought our readers might want a chance to brush up on their pandemic facts. So roll up your sleeves, wash your hands and then try this quiz.

Earth Day is coming up on April 22.

It's an occasion to think about the risks we all face from climate change — and to recognize the toll these problems take on the people in the developing world, who are especially vulnerable. When oceans rise, when drought strikes, the consequences can be dire. People are losing their homes and becoming climate refugees, losing their crops, losing their water sources. Disease-carrying insects are moving into new territory.

It's become an annual tradition for NPR to host a live band in our studios for a full day. This year, we upped the ante and invited around 70 musicians from Washington, D.C.'s National Symphony Orchestra to play the musical interludes between stories on All Things Considered.

It's been five years since the death of Trayvon Martin — and the outrage that sparked the Black Lives Matter movement.

Martin — 17 years old, black and unarmed — was shot by George Zimmerman, a neighborhood watch volunteer in Sanford, Fla.

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