Hells Canyon, the deepest gorge in the U.S., is surprisingly young Hells Canyon is the deepest river canyon in the United States. Now scientists have solved the mystery of when it formed. Nell Greenfieldboyce
The European Space Agency will beam the famous 'Blue Danube' waltz into space A performance of the masterpiece will be transmitted into space on Saturday. The waltz has been associated with space travel since its inclusion in the film 2001: A Space Odyssey. Rebecca Hersher
The battle to protect Europe's wolves The EU is trying to downgrade the protection status of wolves in Europe. Scientists say there are many ways to co-exist with these creatures that are vital for a healthy ecosystem. Ruth Sherlock
Our sensitive teeth likely evolved from the armor of ancient fish A new study reveals that the sensitivity of teeth, which makes them zing in a dentist's chair or ache after biting into something cold, can be traced back to the exoskeletons of ancient, armored fish. Ari Daniel
Insurance costs are soaring around Tornado Alley. Hail is the big problem. While tornadoes can obliterate communities, hailstorms cause damage across much larger areas. Michael Copley
Electric grills are a climate-friendly option to fossil fuel grills Grilling usually involves burning fossil fuel. But some manufacturers are offering electric grills and citing climate change and convenience as reasons to switch. Jeff Brady
Congress moves to loosen toxic air pollution rules The House and Senate both voted to loosen regulations on air pollutants like dioxin and mercury, which are associated with higher cancer risk. Alejandra Borunda
Scientists want to track the world's biodiversity using DNA in the air Scientists have found a way to sample DNA out of the air on a large scale — making it possible to one day track the health and well being of all kinds of species around the world. Ari Daniel
First FDA-cleared Alzheimer's blood test could make diagnoses faster, more accurate The first Alzheimer's blood test cleared by the Food And Drug Administration is poised to change the way doctors diagnose and treat the disease. Jon Hamilton
A brain-dead woman's pregnancy raises questions about Georgia's abortion law A Georgia woman declared brain dead is being kept on life support because she is pregnant. It raises complicated legal questions about restrictive abortion laws in Georgia and other states. Sam Gringlas