div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=poles-north-and-southhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Poles North and South loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer20220202235750680f1a28ab0f07ae69b6html5thumbnails1jpg width=140 height=200 divp© 1958 Nature Publishing Grouppdiv