div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=old-and-new-solutions-to-the-eel-problemhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Old and New Solutions to the Eel Problem loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentinreader031viewer2022020522575068101a28ab0f07ae6e1chtml5thumbnails1jpg width=140 height=200 divp© Nature Publishing Group1959pdiv