The Centers for Disease Control and Prevention said Tuesday that public health officials were investigating an outbreak of E. coli that had sickened 19 people in seven states. 

Olga R. Rodriguez
The appearance of numerous large craters in Siberian permafrost has been attributed, at least by some, to the venting of large pockets of methane gas, possibly in a dramatic or sudden way. Chris Mooney | The Washington Post
Responding to criticism over remarks he made Tuesday, Donald Trump, the Republican presidential candidate and real estate developer, denied on Thursday that he was mocking the appearance of a reporter for The New York Times with a physical disability.Maggie Haberman
Miss Canada, otherwise known as Anastasia Lin, has been denied a Chinese visa to attend the monthlong Miss World pageant, presumably because of her outspoken advocacy for human rights and religious freedom in China.Andrew Jacobs
Some of you will scoff at this childlike view of  refugees, which is so out of sync with the bellicose experts.Dermot Cole
The pope has made ecological concerns a hallmark of his nearly 3-year-old papacy, issuing a landmark encyclical earlier this year that paired the need to care for the environment with the need to care for humanity's most vulnerable.
Worldwide efforts to reduce human emissions of sulfur dioxide and other aerosols have been a victory for environmental and public health advocates. But those pollutants also protect Arctic ice from solar heat. Yereth Rosen
Doctors soon realized they were dealing with the worst attack Paris had seen since World War II. By the time the siege ended, medical teams had attended to 302 patients, including many with life-threatening injuriesKaren Kaplan
Officials say the threat of an Islamic State operative slipping into the United States from Mexico is a real one: Last week, the FBI confirmed that five men from Pakistan and one from Afghanistan were captured near Arizona's border with Mexico, according to ABC affiliate KNXV.Peter Holley | The Washington Post
Deep within the massive stone Jaguar Paw Temple at the ancient Mayan city of El Mirador in Guatemala, scientists have found the bones of the not-so-humble domestic turkey.Sarah Kaplan | The Washington Post