Scientists use fake eggs to monitor cranes

<p>Scientists in Louisiana are using fake eggs to spy on whooping cranes in hopes of learning why some chicks die in the egg, while others hatch. (March 12)</p><p><img src="https://imedia-peoplesdaily.pdnews.cn/up/cms/www/201904/10081944vfcm.jpg" title="无标题3.jpg" alt="无标题3.jpg"/></p><p><span style="color: rgb(127, 127, 127);">Video source: AP</span></p>