本期科学美国人60s文稿在此专辑推广的下方姊妹专辑UC Science Today上线！欢迎订阅，周一到周五日更！<a href="https://www.ximalaya.com/waiyu/33959022/" style="color:#4990E2;text-decoration:none;">UC Science Today</a>（点击左侧蓝字进入专辑页面查看详情） 以下内容为本期科学美国人60s内容：<img data-key="0" src="http://image.xmcdn.com/group74/M0A/84/A8/wKgO3F5xWFzhzne_AAGj5Oc0-J8370.jpg?op_type=4&device_type=ios&upload_type=attachment&name=mobile_large" alt="" data-origin="http://image.xmcdn.com/group74/M0A/84/A8/wKgO3F5xWFzhzne_AAGj5Oc0-J8370.jpg?op_type=0" data-large="http://image.xmcdn.com/group74/M0A/84/A8/wKgO3F5xWFzhzne_AAGj5Oc0-J8370.jpg?op_type=4&device_type=ios&upload_type=attachment&name=mobile_large" data-large-width="750" data-large-height="580" data-preview="http://image.xmcdn.com/group74/M0A/84/A8/wKgO3F5xWFzhzne_AAGj5Oc0-J8370.jpg?op_type=4&device_type=ios&upload_type=attachment&name=mobile_small" data-preview-width="140" data-preview-height="108"> <img data-key="1" src="http://image.xmcdn.com/group75/M04/82/62/wKgO3V5xWGeSXYqjAAgfPdFLwCk040.png?op_type=4&device_type=ios&upload_type=attachment&name=mobile_large" alt="" data-origin="http://image.xmcdn.com/group75/M04/82/62/wKgO3V5xWGeSXYqjAAgfPdFLwCk040.png?op_type=0" data-large="http://image.xmcdn.com/group75/M04/82/62/wKgO3V5xWGeSXYqjAAgfPdFLwCk040.png?op_type=4&device_type=ios&upload_type=attachment&name=mobile_large" data-large-width="750" data-large-height="7424" data-preview="http://image.xmcdn.com/group75/M04/82/62/wKgO3V5xWGeSXYqjAAgfPdFLwCk040.png?op_type=4&device_type=ios&upload_type=attachment&name=mobile_small" data-preview-width="140" data-preview-height="1385">

本期科学美国人60s文稿在此专辑推广的下方姊妹专辑UC Science Today上线！欢迎订阅，周一到周五日更！UC Science Today（点击左侧蓝字进入专辑页面查看详情） 以下内容为本期科学美国人60s内容：

本期科学美国人60s文稿在此专辑推广的下方姊妹专辑UC Science Today上线！欢迎订阅，周一到周五日更！<a href="https://www.ximalaya.com/waiyu/33959022/" rel="noopener noreferrer">UC Science Today</a>（点击左侧蓝字进入专辑页面查看详情） 以下内容为本期科学美国人60s内容：

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2020.3.17 Ancient Clam Shell Reveals Shorter Day Length

2020.3.17 Ancient Clam Shell Reveals Shorter Day Length