French marathon swimmer Benoit Lecomte (left) prepares to jump into the Potomac River in Washington, D.C., in 2002. In 1998, Lecomte swam across the Atlantic Ocean. Manny Ceneta /AFP/Getty Images hide caption

toggle caption Manny Ceneta /AFP/Getty Images
Ben Lecomte Swam Across The Atlantic; Next He Tries The Pacific
  • Download
  • <iframe src="https://www.npr.org/player/embed/433926565/433981089" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

A photo from May shows Gino Celli checking his parched crops near his farm near Stockton, Calif. If predictions of a strong El Niño prove true, it could presage a relief from the region's prolonged drought. Rich Pedroncelli/AP hide caption

toggle caption Rich Pedroncelli/AP

These amphipods were discovered by scientists from the University of Aberdeen in waters more than 4 miles deep, north of New Zealand. Similar shrimplike crawlers may lurk at the bottom of the Challenger Deep. Oceanlab/University of Aberdeen/AP hide caption

toggle caption Oceanlab/University of Aberdeen/AP
7 Miles Beneath The Sea's Surface: Who Goes There?
  • Download
  • <iframe src="https://www.npr.org/player/embed/371670931/371821144" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

The second atomic bomb test at Bikini Atoll on July 25, 1946. The Marshall Islands, where Bikini is located, is suing the U.S. for what it calls a violation of the Nuclear Non-Proliferation Treaty. Anonymous/AP hide caption

toggle caption Anonymous/AP