From a human perspective, some strains are good, some are evil.
E. coli bacteria are the frequent culprits behind outbreaks of food-borne illnesses. But not all strains are harmful; some are even helpful.
Protestors demonstrate inside a Philadelphia Starbucks, where two black men were arrested.
Starbucks is giving this training to its employees, but it’s still so new that there's no standard format and little research yet on whether it's effective.
Citibike station in midtown Manhattan.
Dozens of US cities have launched bike-share programs in the past decade. There have been bumps – critics want wider access, and cities want bikes stored out of the way – but bike sharing is on a roll.
Preschool today, success tomorrow.
AP Photo/Elaine Thompson
Research suggests that government spending on very young children is a good investment.
Is there still room for the U.S.?
AP Photo/Esteban Felix
Trump, who withdrew the US from the Trans-Pacific Partnership when he became president, briefly appeared to consider joining the trade accord again.
Marijuana varieties on display in a California dispensary.
AP Photo/Mathew Sumner
Medical marijuana? Recreational marijuana? Both or neither? Here's a quick guide to the topsy-turvy landscape for marijuana regulation in the US.
A woman holds a Syrian flag during a protest against air strikes on Syria in Baghdad, Iraq on April 15, 2018.
Are air strikes really a way to hold the Syrian regime responsible for its alleged atrocities against humanity? History says no.
Organic? Conventional? Genetically modified? Decisions, decisions.
Affluent consumers may have more access to information about food than lower-income earners, but they are just as vulnerable to misinformation and pseudoscience.
What will he decide to do?
AP Photo/Andrew Harnik
Facebook says it's going to continue to respond to widespread concerns about its practices and role in society. Researchers of privacy and online trust offer ideas for immediate action.
A cargo ship passes the Golden Gate Bridge outside San Francisco.
AP Photo/Jeff Chiu
The maritime pollution that drifts to dry land, causes an estimated 400,000 premature deaths and 14 million cases of childhood asthma each year.
Some Napa and Sonoma Valley wineries are worried about the China tariffs.
AP Photo/Eric Risberg
While the proposed tariffs would have little effect on US wine sales in the short term, their long-term impact could be much more problematic.
A working mom, off the clock.
This penalty can amount to more than 15 percent of a mom's paycheck. Ramping up paid maternity leave and high-quality child care would probably help narrow the gap.
A 1979 image that shows disciples of Rajneesh lying on the ground, in meditation at the mystic’s headquarters in Poona, India.
AP Photo/Eddie Adams
A scholar explains the popular use of the label 'cult,' and what makes it problematic.
What are the rules governing who’s watching you online?
US privacy laws focus on informing consumers what's happening with their data; other countries specifically restrict data collection and analysis.
Texas National Guard soldiers aid stranded residents in Hurricane Harvey’s floodwaters in 2017.
Reuters/Texas Military Department
President Trump proposes to send the National Guard to protect the southern US border. Instead of searching for your old civics textbook, here's a pocket history of the soldiers in the spotlight.
Recounting very close races is not enough to ensure election integrity.
AP Photo/Ben Finley
The best way to protect elections is to plan and prepare for an audit of the results after the votes are cast.
Customers line up to buy gasoline in San Jose, California, on March 15, 1974, during an Arab oil embargo. The crisis spurred enactment of the first U.S. vehicle fuel economy standards.
Since the federal government started setting fuel economy standards, US-built cars have doubled their fuel efficiency, saving money for consumers and reducing pollution.
What will Mark Zuckerberg say to Congress?
AP Photo/Noah Berger
Scholars discuss the Facebook-Cambridge Analytica scandal: what happened, what's at stake, how to fix it, and what could come next.
A farmer harvest his soybean field in Loami, Ill.
AP Photo/Seth Perlman
There's a good reason China took aim at US soybean exports when it announced its latest list of retaliatory tariffs.
Sinclair Broadcast Group is under fire, following the spread of a video showing anchors at its stations reading a script criticizing ‘fake’ news stories.
Steve Ruark/AP Photo
It’s worth looking at how local news stations have traditionally operated.