Who set the guardrails on global temperature rise?
More and more research shows that we are likely to pass the 2 degree Celsius temperature limit much of the world has agreed on. Where did that limit come from, and what if we miss it?
What message would you send to outer space?
Humanity is the real target for these recordings which continue to inspire us to better understand ourselves and our place in the cosmos.
Franklin’s lifelong quest was spreading scientific knowledge to regular people.
Franklin advanced a scientific – not supernatural – understanding of astronomical events such as eclipses. His satirical character 'Poor Richard' mocked those who bought into astrological predictions.
A solar eclipse observed over Grand Canyon National Park in May 2012.
Grand Canyon National Park
More than 2,000 years ago, the Babylonians understood the cycle of eclipses. They also regarded them as signs that could foretell the death of a king.
Six million people in Pennsylvania and neighboring states get their drinking water from the Susquehanna River. Major pollution sources include agriculture, urban development and industry.
Nicholas A. Tonelli
America's drinking water infrastructure is aging and needs billions of dollars in upgrades. Two extension educators urge consumers to monitor their water and have it tested if they suspect problems.
Consumers often distrust mission-driven groups that earn profits.
Brian A Jackson/Shutterstock.com
People may initially assume the worst when they encounter for-profit companies with social missions. What can these social ventures with good intentions do to gain people’s support?
How can we ensure technology brings prosperity to us all?
Political and community leaders must act now to preserve the American middle class and adapt the US economy for the 21st century.
Years from now, she’ll probably be ready to part with her photo assistant.
Most Americans cling to things with sentimental value that we no longer need. Taking pictures of these possessions may make it easier to give them away.
Oak Grove Acapella Singers, a Gospel group of Chester County, Tennessee, being recorded while singing in the office of the preacher at the Oak Grove Church of Christ.
Tennessee State Library and Archives
As the African-American Music
Appreciation Month comes to a close, a scholar discusses the role of early preachers in shaping gospel music.
St. Louis Rams draft pick Michael Sam speaks during a news conference at the team’s practice facility in May 2014.
Since Michael Sam came out in 2014, no one in the NFL, NBA, MLB and NHL has done the same. Are the barriers to coming out still holding firm? Or are there signs that the tide could soon turn?
Those keypads are teeming with microbes.
AP Photo/Charlie Riedel
What's on your cash? Studies show our money carries everything from pet DNA and old food to E.coli and traces of cocaine.
Corbyn may not have won enough seats to take over Parliament, but he dealt May a serious blow nonetheless.
AP Photo/Markus Schreiber
UK voters delivered a devastating blow to the prime minister, who combined a populist message with her party's traditional economic policies. She may now face a power struggle.
Former FBI Director James Comey testifies on Capitol Hill in Washington.
AP Photo/Carolyn Kaster
Hoover abused his power as FBI director to serve presidents' interests. The reforms that followed were set up to prevent it from happening again.
A statue of Confederate General Robert E. Lee is removed on Friday, May 19, 2017, from Lee Circle in New Orleans.
AP Photo/Scott Threlkeld
Monuments to the Confederacy in New Orleans and many other cities are problematic. But a mere erasure will not address the issues around racism and racial inequality.
President Donald Trump with other officials during Arab-Islamic-American Summit in Riyadh, Saudi Arabia.
For Trump, putting America first means that being a global leader on human rights may take a back seat.
Veterans and service members on the job hunt.
Office of Congressman Mike Quigley
Large numbers of veterans hold misconceptions about IT work that discourage them from pursuing careers in the field.
Former FBI Director Robert Mueller testifies on Capitol Hill in Washington in 2011.
AP Photo/Evan Vucci, File
How will Mueller perform as special counsel? A historian compares his actions with another former FBI director to find out.
Tornado seven miles south of Anadarko, Oklahoma, May 3, 1999.
OAR/ERL/National Severe Storms Laboratory/Flickr
More tornadoes occur in the United States than in any other country, mainly in the Great Plains, the Midwest and southern states. Two meteorology professors explain what causes these dangerous storms.
President Donald Trump greets Director of the FBI James Comey in January.
Past presidents have made strange requests of the FBI, some of which were documented by J. Edgar Hoover.
Daniel Day-Lewis won the 2012 Academy Award for his portrayal of Abraham Lincoln. Is Spielberg’s historical drama a good way to learn about the 16th U.S. president?
History movies may have Oscar potential, but their educational potential is more complicated. Should teachers use Hollywood to teach?