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Here's your recap of what happened in the leadership shakeup at the Centers for Disease Control and Prevention this week.

Xinjiang has nearly 20,000 glaciers, half of China's total. They're all receding at a record pace — and will continue to melt, some scientists warn, even if global temperatures stop rising.

Thirty-two years after a deadly earthquake, a magnitude 7.1 temblor rattled Mexico City and surrounding areas. Residents had marked the anniversary of the 1985 quake earlier in the day with drills.

Airstrikes have helped push back the Islamic State in some places, but the group has gained in other areas. Pentagon officials say the U.S. operation may need another two years or more to succeed.

A new study by three media scholars reveals how the social protest movement spread on Twitter, with some fascinating — and sobering — findings.

A CDC advisory panel concluded the nasal spray vaccine is so ineffective that it shouldn't be used by anyone during the 2016-2017 flu season. Until 2015, the spray was the top choice for kids.

They were talented, idealistic risk-takers on the road to what they thought would be important medical discoveries. But when the funding for risk-takers dried up, these two academics called it quits.

The bidding period has closed for the companies hoping to design and deliver the president's signature campaign promise. Here's a glimpse of some proposals — from wire mesh to 30-foot pipe organs.

The Supreme Court hears arguments on the ban Wednesday, and a bipartisan group of former national security officials from the Reagan to Obama administrations are urging the court to strike it down.

The U.S. led late in the third period, but an increasingly desperate Canadian squad scored two goals in less than four minutes. Then it put the game away in overtime.