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A Calculating Win for China's New Supercomputer

China's "Tianhe-2" (Milky Way 2) supercomputer took first place in one recent speed test, clocking in at 30 quadrillion calculations per second--about twice as fast as the best American machines. The U.S. still has more supercomputers than any other nation, but some experts say computer speed is a measure of a country's scientific innovation, and worry the U.S. is lagging behind.

Taking Ivy League Classes Online, For Free

When Stanford professor Andrew Ng put one of his classes online, more than 100,000 students signed up. Now he's co-founded a company, Coursera, with the potential to give millions of students free access to classes from Stanford, Princeton, the University of Pennsylvania and other schools.

It's been a week of chaos at the CDC. Here are 5 things to know

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

With the help of searchlights, rescuers, firefighters, policemen, soldiers and volunteers continue removing the rubble and debris from a flattened building late Monday in search of survivors after a powerful quake in Mexico City. More than 200 people were killed and dozens of buildings were collapsed by the earthquake.

Powerful Quake Devastates Central Mexico, Leaving More Than 200 Dead

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.

Randen Patterson left a research career in physiology at U.C. Davis when funding got too tight. He now owns a grocery store in Guinda, Calif.

When Scientists Give Up

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.

As November Approaches, Trump Overhauls Campaign Staff

Donald Trump named a conservative media provocateur to lead his campaign — in the third major shakeup during the election season. David Greene talks to senior Trump adviser Boris Epshteyn.

How Do We Get Our Drinking Water In The U.S.?

Clean, safe drinking water is essential to life. To get that water, however, requires a sludge of chemicals, countless testings — and different treatment processes depending on where you live.

The protest movement that has sprung up around police violence and criminal justice reform first spread like wildfire online, which researchers say allowed activists to circumvent traditional new media to get their message out.

Combing Through 41 Million Tweets To Show How #BlackLivesMatter Exploded

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

Abigail Fisher, the Texan involved in the University of Texas affirmative action case, talks to reporters outside the Supreme Court in Washington on Wednesday.

Court Questions University's Affirmative Action Plan

At issue is whether the University of Texas, Austin discriminated against a white applicant when it did not offer her a spot. At Wednesday's argument, a court majority seemed poised to reverse or severely cut back previous decisions related to affirmative action programs in college admissions.

Although the fiscal cliff deal was passed by majorities in both chambers, it has still drawn criticism from the left and right.

Cliff Deal: What We Learned; What Comes Next

The lessons of the final deal come down to this: Washington is very nearly broken. Next up? Finishing the work this agreement postponed.

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