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Researchers writing in the journal Science say that if the rate of global warming goes unchecked, the frequency of lightning strikes will increase by 50 percent.

Major League Baseball is reviewing its controversial Rule 7.13, which bans most home plate collisions. Catchers actually face a bigger head-injury risk that the rule can't prevent.

They're some of the most popular musicians in West Africa, joining voices to sing (mainly in French but also in some local languages) about defeating an "invisible enemy."

Two Americans jailed in North Korea have arrived home. NPR's Rachel Martin speaks with former U.S. Ambassador Bill Richardson, who has previously negotiated hostage releases with Pyongyang.

In 2012, 56,337 people were murdered in Brazil. But that figure hides a color-coded truth: Homicide rates are actually way down — if you're white. If you're black? Murder rates are up 40 percent.

Across Africa, hospitals are struggling to provide surgery. Doctors, nurses, and even basics like electricity are in short supply. Now Johns Hopkins Medical Center is testing a creative solution.

Airstrikes against ISIS have had some success. But James Jeffrey, Obama's former ambassador to Iraq, says Americans on the ground are necessary to win the war.

Chancellor Angela Merkel, marking the 25th anniversary of the event, said the destruction of the Wall showed that "nothing has to stay as it is."

In the fiercest fighting in weeks, pro-Russian separatists appear to have renewed a push to seize the city's airport.

Kaci Hickox, who was quarantined after arriving home from caring for Ebola patients in West Africa, plans to leave this week with her boyfriend but hasn't said where they will go.