Across Texas, scores of wildfires are burning out of control. A fire near Austin has burned thousands of acres and hundreds of homes. The Texas Forest Service says whatever the highest priority is, that gets the first attention.
All plants need nitrogen to grow, and a new study says some plants get this nutrient from a surprising source. Conventional wisdom believes nitrogen for plants starts in the air and is converted by microbes in the soil into a usable form. But a report in the journal Nature finds that some nitrogen comes directly from rock. This discovery has implications for global warming.
NPR's Asma Khalid reports on one of several new websites that connect travelers with homeowners who have a spare room. Airbnb is one of the fastest growing of these rental-by-owner sites. But as with other fast-growing businesses, it faces several challenges.