No More Bubble Trouble

• 来源期刊: 中学科技
• 年，卷（期）: 2013,（8）
• 所属期刊栏目: 科普英语
• 页码范围: 28
• 页数: 1页
• 语种: 中文

摘要

When human scientists can't solve a problem,they may look to other species for help.One recent problem:bubbles.The helpful species:the Atlantic bottlenose dolphin,whose clicks helped researchers find a better way to listen underwater. Dolphins hunt using sonar,sending clicks through the water and listening for the echoes.When its clicks bounce back,an animal knows where to find its dinner.But dolphins have also been observed blowing out streams of tiny bubbles as they hunt.That seemed odd,because bubbles reflect sound in ways that change echoes.