A growing number of children are entering puberty at younger ages — sometimes as young as 6 or 7. But in many schools, sex education classes don't begin before the fifth grade. Cuneyt Hizal/iStockphoto.com hide caption

toggle caption Cuneyt Hizal/iStockphoto.com

Puberty Is Coming Earlier, But That Doesn't Mean Sex Ed Is

  • Download
  • <iframe src="https://www.npr.org/player/embed/226116537/236407712" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Pakistanis walk on an island that emerged off the coastline of the Arabian Sea following a deadly magnitude 7.7 earthquake in Pakistan's southern province of Baluchistan on Sept. 24. Gwadar local government office/AP hide caption

toggle caption Gwadar local government office/AP

Party On: Legislation passed last week allows the Federal Helium Reserve to continue selling the stockpiled gas. Above, Jonathan Trappe launches his 370-balloon craft from Caribou, Maine, in an attempt to cross the Atlantic Ocean on Sept. 12. Alexandre Ayre/Barcroft Media/Landov hide caption

toggle caption Alexandre Ayre/Barcroft Media/Landov

Here's Something Congress Can Agree On: Helium

  • Download
  • <iframe src="https://www.npr.org/player/embed/227772534/227869618" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

SpaceX launched an upgraded version of its Falcon 9 rocket Sept. 30 from Vandenberg Air Force Base in California, northwest of Los Angeles. SpaceX hide caption

toggle caption SpaceX
iStockphoto.com

How Our Stone Age Bodies Struggle To Stay Healthy In Modern Times

  • Download
  • <iframe src="https://www.npr.org/player/embed/227777434/227802614" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Workers assemble solar panels at the now-bankrupt Suntech in the eastern Chinese city of Wuxi. Overproduction in the country has helped lower the cost of solar panels. Peter Parks /AFP/Getty Images hide caption

toggle caption Peter Parks /AFP/Getty Images

A wildfire burns in Prescott, Ariz., on June 18. The fire covered nearly 11 square miles of the Prescott National Forest. Todd Tamcsin/AP/American Red Cross hide caption

toggle caption Todd Tamcsin/AP/American Red Cross

Is Living With Extreme Wildfires The New Normal?

  • Download
  • <iframe src="https://www.npr.org/player/embed/227556368/227551589" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Babies Smell Delicious, Just Like A Cheeseburger

  • Download
  • <iframe src="https://www.npr.org/player/embed/227431388/227433187" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

But Can Your Smartphone Pick The Fastest Checkout Line?

  • Download
  • <iframe src="https://www.npr.org/player/embed/227431382/227431365" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Shinichi Kuramoto of the Center for Deep Earth Exploration in Japan displays a replica of earthquake fault rock. TOSHIFUMI KITAMURA/AFP/Getty Images hide caption

toggle caption TOSHIFUMI KITAMURA/AFP/Getty Images